{
    "dom-mathmlelement": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "api/MathMLElement.json",
            "name": "MathMLElement",
            "slug": "API/MathMLElement",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/MathMLElement",
            "summary": "The MathMLElement interface represents any MathML element.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "80",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "71"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "13.1"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "80",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "MathMLElement"
        }
    ],
    "the-math-script-level-property": [
        {
            "engines": [
                "blink",
                "gecko"
            ],
            "filename": "css/properties/math-depth.json",
            "name": "math-depth",
            "slug": "CSS/math-depth",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/CSS/math-depth",
            "summary": "The math-depth property describes a notion of depth for each element of a mathematical formula, with respect to the top-level container of that formula. Concretely, this is used to determine the computed value of the font-size property when its specified value is math.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "87",
                        "impl_url": "https://crrev.com/c/2423843",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": [
                    {
                        "version_added": "117"
                    },
                    {
                        "version_added": "83",
                        "impl_url": "https://bugzil.la/1667090",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "layout.css.math-depth.enabled",
                                "value_to_set": "true"
                            }
                        ],
                        "notes": "Implementation lacks support for <code>font-size: math</code> to be complete."
                    }
                ],
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false,
                    "notes": "See <a href='https://webkit.org/b/202303'>bug 202303</a>."
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "87",
                        "impl_url": "https://crrev.com/c/2423843",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features"
                            }
                        ]
                    }
                ]
            },
            "title": "math-depth"
        }
    ],
    "the-math-shift": [
        {
            "engines": [
                "blink"
            ],
            "filename": "css/properties/math-shift.json",
            "name": "math-shift",
            "slug": "CSS/math-shift",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/CSS/math-shift",
            "summary": "The math-shift property indicates whether superscripts inside MathML formulas should be raised by a normal or compact shift.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "87",
                        "impl_url": "https://crrev.com/c/2421662",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "87",
                        "impl_url": "https://crrev.com/c/2421662",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features"
                            }
                        ]
                    }
                ]
            },
            "title": "math-shift"
        }
    ],
    "the-math-style-property": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "css/properties/math-style.json",
            "name": "math-style",
            "slug": "CSS/math-style",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/CSS/math-style",
            "summary": "The math-style property indicates whether MathML equations should render with normal or compact height.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "83",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": [
                    {
                        "version_added": "117"
                    },
                    {
                        "version_added": "83",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "layout.css.math-style.enabled",
                                "value_to_set": "true"
                            }
                        ]
                    }
                ],
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "14.1"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "83",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features"
                            }
                        ]
                    }
                ]
            },
            "title": "math-style"
        }
    ],
    "the-top-level-math-element": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/math.json",
            "name": "math",
            "slug": "MathML/Element/math",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/math",
            "summary": "The <math> MathML element is the top-level MathML element, used to write a single mathematical formula. It can be placed in HTML content where flow content is permitted.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "80",
                        "impl_url": "https://crbug.com/6606",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    },
                    {
                        "version_added": "24",
                        "version_removed": "25",
                        "partial_implementation": true,
                        "impl_url": "https://crbug.com/152430",
                        "notes": "Removed in Chrome 25 because <a href='https://crbug.com/152430#c32'>code was not yet production ready</a>."
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": [
                    {
                        "version_added": "4"
                    },
                    {
                        "version_added": "1",
                        "partial_implementation": true,
                        "notes": "Only supported in XHTML documents."
                    }
                ],
                "firefox_android": {
                    "version_added": "4"
                },
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": [
                    {
                        "version_added": "95"
                    },
                    {
                        "version_added": "67",
                        "impl_url": "https://crbug.com/6606",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    },
                    {
                        "version_added": "9.5",
                        "version_removed": "15",
                        "partial_implementation": true,
                        "notes": "Only supported in XHTML documents."
                    }
                ],
                "opera_android": [
                    {
                        "version_added": "74"
                    },
                    {
                        "version_added": "10.1",
                        "version_removed": "14",
                        "partial_implementation": true,
                        "notes": "Only supported in XHTML documents."
                    }
                ],
                "safari": {
                    "version_added": "5.1"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "80",
                        "impl_url": "https://crbug.com/6606",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    },
                    {
                        "version_added": false,
                        "version_removed": "25",
                        "partial_implementation": true,
                        "impl_url": "https://crbug.com/152430",
                        "notes": "Removed in Chrome 25 because <a href='https://crbug.com/152430#c32'>code was not yet production ready</a>."
                    }
                ]
            },
            "title": "<math>"
        }
    ],
    "error-message-merror": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/merror.json",
            "name": "merror",
            "slug": "MathML/Element/merror",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/merror",
            "summary": "The <merror> MathML element is used to display contents as error messages. The intent of this element is to provide a standard way for programs that generate MathML from other input to report syntax errors.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "81",
                        "impl_url": "https://crrev.com/c/1913250",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "81",
                        "impl_url": "https://crrev.com/c/1913250",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<merror>"
        }
    ],
    "fractions-mfrac": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mfrac.json",
            "name": "mfrac",
            "slug": "MathML/Element/mfrac",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mfrac",
            "summary": "The <mfrac> MathML element is used to display fractions. It can also be used to mark up fraction-like objects such as binomial coefficients and Legendre symbols.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "83",
                        "impl_url": "https://crrev.com/c/2041665",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "5.1"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "83",
                        "impl_url": "https://crrev.com/c/2041665",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mfrac>"
        }
    ],
    "dfn-mi": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mi.json",
            "name": "mi",
            "slug": "MathML/Element/mi",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mi",
            "summary": "The <mi> MathML element indicates that the content should be rendered as an identifier such as function names, variables or symbolic constants. You can also have arbitrary text in it to mark up terms.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "87",
                        "impl_url": "https://crrev.com/c/2391150",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "87",
                        "impl_url": "https://crrev.com/c/2391150",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mi>"
        }
    ],
    "prescripts-and-tensor-indices-mmultiscripts": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mmultiscripts.json",
            "name": "mmultiscripts",
            "slug": "MathML/Element/mmultiscripts",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mmultiscripts",
            "summary": "The <mmultiscripts> MathML element is used to attach an arbitrary number of subscripts and superscripts to an expression at once, generalizing the <msubsup> element. Scripts can be either prescripts (placed before the expression) or postscripts (placed after it).",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "86",
                        "impl_url": "https://crrev.com/c/2264334",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "86",
                        "impl_url": "https://crrev.com/c/2264334",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mmultiscripts>"
        }
    ],
    "number-mn": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mn.json",
            "name": "mn",
            "slug": "MathML/Element/mn",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mn",
            "summary": "The <mn> MathML element represents a numeric literal which is normally a sequence of digits with a possible separator (a dot or a comma). However, it is also allowed to have arbitrary text in it which is actually a numeric quantity, for example \"eleven\".",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "87",
                        "impl_url": "https://crrev.com/c/2391150",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "87",
                        "impl_url": "https://crrev.com/c/2391150",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mn>"
        }
    ],
    "operator-fence-separator-or-accent-mo": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mo.json",
            "name": "mo",
            "slug": "MathML/Element/mo",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mo",
            "summary": "The <mo> MathML element represents an operator in a broad sense. Besides operators in strict mathematical meaning, this element also includes \"operators\" like parentheses, separators like comma and semicolon, or \"absolute value\" bars.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "95",
                        "impl_url": "https://crrev.com/c/3121110",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "5"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "95",
                        "impl_url": "https://crrev.com/c/3121110",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mo>"
        }
    ],
    "underscripts-and-overscripts-munder-mover-munderover": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mover.json",
            "name": "mover",
            "slug": "MathML/Element/mover",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mover",
            "summary": "The <mover> MathML element is used to attach an accent or a limit over an expression. Use the following syntax: <mover> base overscript </mover>",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "84",
                        "impl_url": "https://crrev.com/c/2119538",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "84",
                        "impl_url": "https://crrev.com/c/2119538",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mover>"
        },
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/munder.json",
            "name": "munder",
            "slug": "MathML/Element/munder",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/munder",
            "summary": "The <munder> MathML element is used to attach an accent or a limit under an expression. It uses the following syntax: <munder> base underscript </munder>",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "84",
                        "impl_url": "https://crrev.com/c/2119538",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "5.1"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "84",
                        "impl_url": "https://crrev.com/c/2119538",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<munder>"
        },
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/munderover.json",
            "name": "munderover",
            "slug": "MathML/Element/munderover",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/munderover",
            "summary": "The <munderover> MathML element is used to attach accents or limits both under and over an expression.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "84",
                        "impl_url": "https://crrev.com/c/2119538",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "84",
                        "impl_url": "https://crrev.com/c/2119538",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<munderover>"
        }
    ],
    "adjust-space-around-content-mpadded": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mpadded.json",
            "name": "mpadded",
            "slug": "MathML/Element/mpadded",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mpadded",
            "summary": "The <mpadded> MathML element is used to add extra padding and to set the general adjustment of position and size of enclosed contents.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "86",
                        "impl_url": "https://crrev.com/c/2288388",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "86",
                        "impl_url": "https://crrev.com/c/2288388",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mpadded>"
        }
    ],
    "making-sub-expressions-invisible-mphantom": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mphantom.json",
            "name": "mphantom",
            "slug": "MathML/Element/mphantom",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mphantom",
            "summary": "The <mphantom> MathML element is rendered invisibly, but dimensions (such as height, width, and baseline position) are still kept.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "81",
                        "impl_url": "https://crrev.com/c/1913250",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "81",
                        "impl_url": "https://crrev.com/c/1913250",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mphantom>"
        }
    ],
    "radicals-msqrt-mroot": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mroot.json",
            "name": "mroot",
            "slug": "MathML/Element/mroot",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mroot",
            "summary": "The <mroot> MathML element is used to display roots with an explicit index. Two arguments are accepted, which leads to the syntax: <mroot> base index </mroot>.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "86",
                        "impl_url": "https://crrev.com/c/2190671",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "86",
                        "impl_url": "https://crrev.com/c/2190671",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mroot>"
        },
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/msqrt.json",
            "name": "msqrt",
            "slug": "MathML/Element/msqrt",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/msqrt",
            "summary": "The <msqrt> MathML element is used to display square roots (no index is displayed). The square root accepts only one argument, which leads to the following syntax: <msqrt> base </msqrt>.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "86",
                        "impl_url": "https://crrev.com/c/2190671",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "5.1"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "86",
                        "impl_url": "https://crrev.com/c/2190671",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<msqrt>"
        }
    ],
    "horizontally-group-sub-expressions-mrow": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mrow.json",
            "name": "mrow",
            "slug": "MathML/Element/mrow",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mrow",
            "summary": "The <mrow> MathML element is used to group sub-expressions, which usually contain one or more operators with their respective operands (such as <mi> and <mn>). This element renders as a horizontal row containing its arguments.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "81",
                        "impl_url": "https://crrev.com/c/1913250",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "81",
                        "impl_url": "https://crrev.com/c/1913250",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mrow>"
        }
    ],
    "string-literal-ms": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/ms.json",
            "name": "ms",
            "slug": "MathML/Element/ms",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/ms",
            "summary": "The <ms> MathML element represents a string literal meant to be interpreted by programming languages and computer algebra systems.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "87",
                        "impl_url": "https://crrev.com/c/2391150",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "9"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "87",
                        "impl_url": "https://crrev.com/c/2391150",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<ms>"
        }
    ],
    "space-mspace": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mspace.json",
            "name": "mspace",
            "slug": "MathML/Element/mspace",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mspace",
            "summary": "The <mspace> MathML element is used to display a blank space, whose size is set by its attributes.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "81",
                        "impl_url": "https://crrev.com/c/1936251",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "7"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "81",
                        "impl_url": "https://crrev.com/c/1936251",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mspace>"
        }
    ],
    "style-change-mstyle": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mstyle.json",
            "name": "mstyle",
            "slug": "MathML/Element/mstyle",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mstyle",
            "summary": "The <mstyle> MathML element is used to change the style of its children.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "88",
                        "impl_url": "https://crrev.com/c/1908533",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    },
                    {
                        "version_added": "80",
                        "partial_implementation": true,
                        "impl_url": "https://crrev.com/c/1908533",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ],
                        "notes": "Only basic support with attributes <code>dir</code>, <code>mathbackground</code>, <code>mathcolor</code> and <code>mathsize</code>."
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": [
                    {
                        "version_added": "6",
                        "notes": [
                            "In Firefox 29, accepted attributes have been restricted to those actually used in practice: <code>id</code>, <code>class</code>, <code>style</code>, <code>href</code>, <code>mathcolor</code>, <code>mathbackground</code>, <code>scriptlevel</code>, <code>displaystyle</code>, <code>scriptsizemultiplier</code>, <code>scriptminsize</code>, <code>dir</code>, <code>mathsize</code>, <code>mathvariant</code>, <code>fontfamily</code>, <code>fontweight</code>, <code>fontstyle</code>, <code>fontsize</code>, <code>color</code>, <code>background</code>.",
                            "In Firefox 103, attributes <code>scriptsizemultiplier</code> and <code>scriptminsize</code> have been removed."
                        ]
                    },
                    {
                        "version_added": "1",
                        "partial_implementation": true,
                        "notes": "Attributes <code>bevelled</code>, <code>notation</code>, <code>open</code>, <code>close</code>, <code>separators</code>, <code>accent</code>, <code>accentunder</code>, <code>selection</code>, <code>mathvariant</code> are not supported."
                    }
                ],
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "5.1"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "88",
                        "impl_url": "https://crrev.com/c/1908533",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    },
                    {
                        "version_added": "80",
                        "partial_implementation": true,
                        "impl_url": "https://crrev.com/c/1908533",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ],
                        "notes": "Only basic support with attributes <code>dir</code>, <code>mathbackground</code>, <code>mathcolor</code> and <code>mathsize</code>."
                    }
                ]
            },
            "title": "<mstyle>"
        }
    ],
    "subscripts-and-superscripts-msub-msup-msubsup": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/msub.json",
            "name": "msub",
            "slug": "MathML/Element/msub",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/msub",
            "summary": "The <msub> MathML element is used to attach a subscript to an expression.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "84",
                        "impl_url": "https://crrev.com/c/2128081",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "84",
                        "impl_url": "https://crrev.com/c/2128081",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<msub>"
        },
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/msubsup.json",
            "name": "msubsup",
            "slug": "MathML/Element/msubsup",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/msubsup",
            "summary": "The <msubsup> MathML element is used to attach both a subscript and a superscript, together, to an expression.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "84",
                        "impl_url": "https://crrev.com/c/2128081",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "84",
                        "impl_url": "https://crrev.com/c/2128081",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<msubsup>"
        },
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/msup.json",
            "name": "msup",
            "slug": "MathML/Element/msup",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/msup",
            "summary": "The <msup> MathML element is used to attach a superscript to an expression.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "84",
                        "impl_url": "https://crrev.com/c/2128081",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "84",
                        "impl_url": "https://crrev.com/c/2128081",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<msup>"
        }
    ],
    "table-or-matrix-mtable": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mtable.json",
            "name": "mtable",
            "slug": "MathML/Element/mtable",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mtable",
            "summary": "The <mtable> MathML element allows you to create tables or matrices. Its children are <mtr> elements (representing rows), each of them having <mtd> elements as its children (representing cells). These elements are similar to <table>, <tr> and <td> elements of HTML.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "104",
                        "impl_url": "https://crrev.com/c/3657309",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "5.1"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "104",
                        "impl_url": "https://crrev.com/c/3657309",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mtable>"
        }
    ],
    "entry-in-table-or-matrix-mtd": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mtd.json",
            "name": "mtd",
            "slug": "MathML/Element/mtd",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mtd",
            "summary": "The <mtd> MathML element represents a cell in a table or a matrix. It may only appear in a <mtr> element. This element is similar to the <td> element of HTML.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "104",
                        "impl_url": "https://crrev.com/c/3657309",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "5.1"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "104",
                        "impl_url": "https://crrev.com/c/3657309",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mtd>"
        }
    ],
    "text-mtext": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mtext.json",
            "name": "mtext",
            "slug": "MathML/Element/mtext",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mtext",
            "summary": "The <mtext> MathML element is used to render arbitrary text with no notational meaning, such as comments or annotations.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "87",
                        "impl_url": "https://crrev.com/c/2391150",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "6"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "87",
                        "impl_url": "https://crrev.com/c/2391150",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mtext>"
        }
    ],
    "row-in-table-or-matrix-mtr": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/mtr.json",
            "name": "mtr",
            "slug": "MathML/Element/mtr",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mtr",
            "summary": "The <mtr> MathML element represents a row in a table or a matrix. It may only appear in a <mtable> element and its children are <mtd> elements representing cells. This element is similar to the <tr> element of HTML.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "104",
                        "impl_url": "https://crrev.com/c/3657309",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "5.1"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "104",
                        "impl_url": "https://crrev.com/c/3657309",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<mtr>"
        }
    ],
    "semantics-and-presentation": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/elements/semantics.json",
            "name": "semantics",
            "slug": "MathML/Element/semantics",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Element/semantics",
            "summary": "The <semantics> MathML element associates annotations with a MathML expression, for example its text source as a lightweight markup language or mathematical meaning expressed in a special XML dialect. Typically, its structure is:",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "88",
                        "impl_url": "https://crrev.com/c/2467903",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "1"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "5"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "88",
                        "impl_url": "https://crrev.com/c/2467903",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "<semantics>"
        }
    ],
    "dfn-dir": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/global_attributes.json",
            "name": "dir",
            "slug": "MathML/Global_attributes/dir",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Global_attributes/dir",
            "summary": "The dir global attribute is an enumerated attribute that indicates the directionality of the MathML element.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "80",
                        "impl_url": "https://crrev.com/c/1908533",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "70",
                    "impl_url": "https://hg.mozilla.org/mozilla-central/rev/3b30c8db537c",
                    "notes": "Prior to Firefox 70, the attribute was only accepted on a few elements, as specified in MathML 3."
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": {
                    "version_added": false
                },
                "opera_android": "mirror",
                "safari": {
                    "version_added": "8",
                    "impl_url": "https://trac.webkit.org/changeset/159504"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "80",
                        "impl_url": "https://crrev.com/c/1908533",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "dir"
        }
    ],
    "dfn-displaystyle": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "mathml/global_attributes.json",
            "name": "displaystyle",
            "slug": "MathML/Global_attributes/displaystyle",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Global_attributes/displaystyle",
            "summary": "The displaystyle global attribute is a boolean setting the math-style of a MathML element.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "83",
                        "impl_url": "https://crrev.com/c/2105317",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "83",
                    "impl_url": "https://hg.mozilla.org/mozilla-central/rev/60a72a6c7c1d",
                    "notes": "Prior to Firefox 83, the attribute was only accepted on a few elements, as specified in MathML 3, and was not implemented via <code>math-style</code>."
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": {
                    "version_added": false
                },
                "opera_android": "mirror",
                "safari": {
                    "version_added": "14",
                    "impl_url": "https://trac.webkit.org/changeset/267578",
                    "notes": "Since Safari 14.1, this attribute is implemented via <code>math-style</code>."
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "83",
                        "impl_url": "https://crrev.com/c/2105317",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "displaystyle"
        }
    ],
    "dfn-mathvariant": [
        {
            "engines": [
                "gecko"
            ],
            "partial": [
                "blink",
                "webkit"
            ],
            "filename": "mathml/global_attributes.json",
            "name": "mathvariant",
            "slug": "MathML/Global_attributes/mathvariant",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Global_attributes/mathvariant",
            "summary": "The mathvariant global attribute sets a logical class for textual elements, which is visually distinguished by using special Mathematical Alphanumeric Symbols. Except for mi elements with a single character, which are by convention italic, no special classes are used by default.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109",
                        "partial_implementation": true,
                        "notes": "The only value supported is 'normal'."
                    },
                    {
                        "version_added": "84",
                        "partial_implementation": true,
                        "notes": "The only value supported is 'normal'.",
                        "impl_url": "https://crrev.com/c/2161013",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "70",
                    "impl_url": "https://hg.mozilla.org/mozilla-central/rev/3b30c8db537c",
                    "notes": [
                        "Prior to Firefox 70, the attribute was only accepted on a few elements, as specified in MathML 3.",
                        "Implementation does not rely on the CSS approach described in MathML Core (via <code>text-transform</code>."
                    ]
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": {
                    "version_added": false
                },
                "opera_android": "mirror",
                "safari": {
                    "version_added": "10",
                    "impl_url": "https://trac.webkit.org/changeset/203679",
                    "partial_implementation": true,
                    "notes": [
                        "Safari only accepts the attribute on a few elements, as specified in MathML 3.",
                        "Implementation does not rely on the CSS approach described in MathML Core (via <code>text-transform</code>."
                    ]
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109",
                        "partial_implementation": true,
                        "notes": "The only value supported is 'normal'."
                    },
                    {
                        "version_added": "84",
                        "partial_implementation": true,
                        "notes": "The only value supported is 'normal'.",
                        "impl_url": "https://crrev.com/c/2161013",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "mathvariant"
        }
    ],
    "dfn-scriptlevel": [
        {
            "engines": [
                "blink",
                "gecko"
            ],
            "filename": "mathml/global_attributes.json",
            "name": "scriptlevel",
            "slug": "MathML/Global_attributes/scriptlevel",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/MathML/Global_attributes/scriptlevel",
            "summary": "The scriptlevel global attribute sets the math-depth of a MathML element. It allows overriding rules from the user agent stylesheet that define automatic calculation of font-size within MathML formulas.",
            "support": {
                "chrome": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "88",
                        "impl_url": "https://crrev.com/c/2474780",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ],
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "70",
                    "impl_url": "https://hg.mozilla.org/mozilla-central/rev/3b30c8db537c",
                    "notes": [
                        "Prior to Firefox 70, the attribute was only accepted on a few elements, as specified in MathML 3.",
                        "Implementation does not rely on the CSS approach described in MathML Core (via <code>math-depth</code> and <code>font-size: math</code>)."
                    ]
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": {
                    "version_added": false
                },
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": [
                    {
                        "version_added": "109"
                    },
                    {
                        "version_added": "88",
                        "impl_url": "https://crrev.com/c/2474780",
                        "flags": [
                            {
                                "type": "preference",
                                "name": "#enable-experimental-web-platform-features",
                                "value_to_set": "Enabled"
                            }
                        ]
                    }
                ]
            },
            "title": "scriptlevel"
        }
    ]
}
