XBRL 2.1 and Dimensions standard for taxonomy structure and data validation
Inline XBRL 1.1 for tagging of narrative text including continuations where needed
Example
Narrative disclosures (text rather than numbers) can be tagged so that information is machine extractable as well as human readable. Those tags can be nested. An example with two different tags (blue dotted highlight is one tag, blue solid highlight is another tag):

An XBRL viewer can then show the taxonomy details relating to the tag:

Links
- Example filing with narrative tagging and below are direct links to different narrative tags: