Identifying meta tag standards across commonly used meta vocabularies

Question

While attempting to identify various standards concerning meta-tags (and data) I have had very little (to no) luck in doing so. Fundamentally, my aim is to identify an area, organization, or site throughout the Internet that offers a comprehensive listing of all of the current (i.e., non-deprecated) meta-attribute types and keywords (i.e., name, http-equiv, itemprop, etc…) in conjunction with their individualized data-types, format, and delimiter tokens, as well as whether the tag (in question) should be self-closed or not. For example:

Tag:
     <meta name="keywords" content="key0,key1,key2">
----------------------------------------------------------------------------
Breakdown:

     <meta

         name=       <= attribute-type 
         ”keywords”  <= “keyword”

         content=“   <= attribute-value
         key0        <= string data-type
         ,           <= comma delimiter
         key1        <= string data-type
         ,           <= comma delimiter
         ""          <= etc...

     />              <= recommended self-closing bracket
----------------------------------------------------------------------------

or

Tag:
     <meta http-equiv="refresh" content="30;URL='http://domain.com/">

----------------------------------------------------------------------------

Breakdown:

     <meta

         http-equiv= <= attribute-type 
         ”refresh”   <= “keyword”

         content=“   <= attribute-value
         30          <= integer (or number) data-type
         ;           <= semi-colon delimiter
         URL=        <= attribute (optional)
        'http://..' <= URL format expected

     />              <= recommended self-closing bracket
----------------------------------------------------------------------------

Naturally, I've scrubbed the web for days with little success. Albeit, schema.org, metatags.org, and the WHATWG communities living HTML standard concerning microdata encoding (https://html.spec.whatwg.org/multipage/#toc-microdata) have been the best sources towards assisting me in identifying the currently recommend standards and usage, there are a myriad of other resources that offer conflicting data, outdated information, and do not include the other common meta vocabulary standards used throughout the web, such as DublinCore, OpenGraph, etc… If anyone could assist me in pointing me in the right direction, I would surely appreciate it, and if not, then I appreciate at least appreciate you taking the time to read this request.

Thanks and cheers.

score 0 · Accepted Answer · answered Feb 28 '16 at 13:34

If you specifically care about meta elements, these two registries might be of help:

Coupled with the HTML Standard they should provide a pretty exhaustive view of that element.

Identifying meta tag standards across commonly used meta vocabularies

1 Answers1