Extend default search predicates

[leskneebone]

Default search predicates are mentioned here:

https://github.com/RDFLib/prez/tree/v4.1.0?tab=readme-ov-file#language-and-search-configuration

default_search_predicates

rdfs:label
skos:prefLabel
sdo:name
dcterms:title

Suggest extending the defaults to include additional textual labels used in vocabularies:

skos:altLabel
skos:hiddenLabel

These properties capture the synonyms (semantic variants, but also including alternate spellings, acronyms etc) and are key to connecting user search terminology with resource language.

[recalcitrantsupplant]

I wonder if we provide a query parameter where you can specify the search predicates so you can when running a query? In a UI you could then select whichever predicates you want (and set whatever defaults in the UI).

Would people always want to include alt/hidden labels in the search?

[leskneebone]

Alt/hidden labels pretty much exist to improve search. In my opinion they are as essential as the prefLabel.

But I like the idea of a parameter because there could be other cases that are less clear cut. For example, schema:description / dcterms:description. Depending on the catalogue, these may improve search results, or they might just create noise and false positives. That might not be a good default, but would be good to have as an option (I'm thinking an option for an admin user, not an end user). What kind of user would use such a parameter?

[recalcitrantsupplant]

OK sounds best if we add them in with the defaults and also add an option to specify which one to use.

So this would be, including full text search:

• For regex search, config specifies defaults (including alt/hidden). User can specify one or more of any predicate to use these instead.
• For full text search, config specifies indexed fields. These are used as a default (search all indexed fields), and users can specify one or more fields to search, within the set of indexed fields.

This would also allow UIs to define other defaults; the UI can always pass through an alternate set of predicates to use for search.