{
  "mathml": {
    "global_attributes": {
      "dir": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/MathML/Global_attributes/dir",
          "spec_url": "https://w3c.github.io/mathml-core/#dfn-dir",
          "tags": [
            "web-features:mathml"
          ],
          "support": {
            "chrome": {
              "version_added": "109"
            },
            "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": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "8",
              "impl_url": "https://trac.webkit.org/changeset/159504"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "displaystyle": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/MathML/Global_attributes/displaystyle",
          "spec_url": "https://w3c.github.io/mathml-core/#dfn-displaystyle",
          "tags": [
            "web-features:mathml"
          ],
          "support": {
            "chrome": {
              "version_added": "109"
            },
            "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 `math-style`."
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": false
            },
            "oculus": "mirror",
            "opera": "mirror",
            "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 `math-style`."
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "href": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/MathML/Global_attributes/href",
          "tags": [
            "web-features:mathml"
          ],
          "support": {
            "chrome": {
              "version_added": false
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "7",
              "impl_url": "https://hg.mozilla.org/mozilla-central/rev/12294b20e4d9"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": false
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "10",
              "impl_url": "https://trac.webkit.org/changeset/203104"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": false,
            "deprecated": false
          }
        }
      },
      "mathbackground": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/MathML/Global_attributes/mathbackground",
          "spec_url": "https://w3c.github.io/mathml-core/#dfn-mathbackground",
          "support": {
            "chrome": {
              "version_added": "109"
            },
            "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": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "5",
              "impl_url": "https://trac.webkit.org/changeset/62968"
            },
            "safari_ios": {
              "version_added": "4",
              "impl_url": "https://trac.webkit.org/changeset/62968"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "mathcolor": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/MathML/Global_attributes/mathcolor",
          "spec_url": "https://w3c.github.io/mathml-core/#dfn-mathcolor",
          "support": {
            "chrome": {
              "version_added": "109"
            },
            "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": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "5",
              "impl_url": "https://trac.webkit.org/changeset/62968"
            },
            "safari_ios": {
              "version_added": "4",
              "impl_url": "https://trac.webkit.org/changeset/62968"
            },
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        }
      },
      "mathsize": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/MathML/Global_attributes/mathsize",
          "spec_url": "https://w3c.github.io/mathml-core/#dfn-mathsize",
          "support": {
            "chrome": {
              "version_added": "109"
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": [
              {
                "version_added": "70",
                "impl_url": "https://hg.mozilla.org/mozilla-central/rev/3b30c8db537c"
              },
              {
                "version_added": "1",
                "partial_implementation": true,
                "notes": "Attribute only accepted on a few elements, as specified in MathML 3."
              }
            ],
            "firefox_android": "mirror",
            "ie": {
              "version_added": false
            },
            "oculus": "mirror",
            "opera": "mirror",
            "opera_android": "mirror",
            "safari": {
              "version_added": "5",
              "impl_url": "https://trac.webkit.org/changeset/63079"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": "mirror",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": true
          }
        },
        "named_spaces": {
          "__compat": {
            "description": "Named spaces (e.g. `thinmathspace` to mean 3/18em)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/MathML/Values",
            "support": {
              "chrome": {
                "version_added": false
              },
              "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": "10"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": true
            }
          }
        },
        "nonzero_unitless_values": {
          "__compat": {
            "description": "Nonzero unitless values (e.g. 5 to mean 500%)",
            "mdn_url": "https://developer.mozilla.org/docs/Web/MathML/Values",
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "1",
                "version_removed": "70"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": false
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "10"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": true
            }
          }
        },
        "small_normal_big": {
          "__compat": {
            "description": "`small`, `normal`, `big` values",
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "1",
                "version_removed": "83"
              },
              "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",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": true
            }
          }
        }
      },
      "scriptlevel": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/MathML/Global_attributes/scriptlevel",
          "spec_url": "https://w3c.github.io/mathml-core/#dfn-scriptlevel",
          "tags": [
            "web-features:mathml"
          ],
          "support": {
            "chrome": {
              "version_added": "109"
            },
            "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 `math-depth` and `font-size: math`)."
              ]
            },
            "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",
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      }
    }
  }
}