I meant APIs, not UI or tooltips. And while Wikidata entities and properties could be accessed using MediaWiki API, arguably, there are, at least, two issues wi

I meant APIs, not UI or tooltips. And while Wikidata entities and properties could be accessed using MediaWiki API, arguably, there are, at least, two issues with this: 1) you have to know exact names of all the relevant metadata, which is quite overwhelming* (and the SPARQL query editor's autocomplete feature does not seem to help with this, except for top-level attributes); 2) entity disambiguation - yes, it can be implemented programmatically, however, it has to rely on knowing exact names (values), which brings us back to the point #1. *) Here is an example of the number of attributes for a single entity: https://www.wikidata.org/w/api.php?action=wbgetentities&ids=Q42&languages=en https://www.wikidata.org/w/api.php?action=wbgetentities&ids=....