Begin work on converting XPath data

index.js

@@ -40,5 +40,6 @@ module.exports = load(
   'mathml',
   'svg',
   'webdriver',
-  'webextensions'
+  'webextensions',
+  'xpath',
 );

test/lint.js

@@ -54,7 +54,8 @@ if (process.argv[2]) {
     'mathml',
     'test',
     'webdriver',
-    'webextensions'
+    'webextensions',
+    'xpath',
   );
 }
 

xpath/axes/self.json

@@ -0,0 +1,57 @@
+{
+  "xpath": {
+    "axes": {
+      "self": {
+        "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Web/XPath/Axes/self",
+          "support": {
+            "chrome": {
+              "version_added": true
+            },
+            "chrome_android": {
+              "version_added": true
+            },
+            "edge": {
+              "version_added": null
+            },
+            "edge_mobile": {
+              "version_added": null
+            },
+            "firefox": {
+              "version_added": true
+            },
+            "firefox_android": {
+              "version_added": true
+            },
+            "ie": {
+              "version_added": null
+            },
+            "opera": {
+              "version_added": true
+            },
+            "opera_android": {
+              "version_added": true
+            },
+            "safari": {
+              "version_added": null
+            },
+            "safari_ios": {
+              "version_added": null
+            },
+            "samsunginternet_android": {
+              "version_added": null
+            },
+            "webview_android": {
+              "version_added": null
+            }
+          },
+          "status": {
+            "experimental": false,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      }
+    }
+  }
+}