Merge pull request #4942 from darobin/rdfa-attributes

Add RDFa attributes not already covered (fixes #3459)

src/renderers/dom/shared/HTMLDOMPropertyConfig.js

@@ -167,6 +167,19 @@ var HTMLDOMPropertyConfig = {
     wmode: MUST_USE_ATTRIBUTE,
     wrap: null,
 
+    /**
+     * RDFa Properties
+     */
+    about: MUST_USE_ATTRIBUTE,
+    datatype: MUST_USE_ATTRIBUTE,
+    inlist: MUST_USE_ATTRIBUTE,
+    prefix: MUST_USE_ATTRIBUTE,
+    // property is also supported for OpenGraph in meta tags.
+    property: MUST_USE_ATTRIBUTE,
+    resource: MUST_USE_ATTRIBUTE,
+    typeof: MUST_USE_ATTRIBUTE,
+    vocab: MUST_USE_ATTRIBUTE,
+
     /**
      * Non-standard Properties
      */
@@ -186,8 +199,6 @@ var HTMLDOMPropertyConfig = {
     // https://html.spec.whatwg.org/multipage/microdata.html#microdata-dom-api
     itemID: MUST_USE_ATTRIBUTE,
     itemRef: MUST_USE_ATTRIBUTE,
-    // property is supported for OpenGraph in meta tags.
-    property: null,
     // results show looking glass icon and recent searches on input
     // search fields in WebKit/Blink
     results: null,