The SPARQL query results JSON format is currently write only in Oxigraph. It would be nice to have a parser, maybe based on a streaming JSON parser library. It should be fairly similar to the XML parser written in lib/src/sparql/xml_results.rs .

The handling of binding substitution fails for queries of the form select (func(?x) as ?y). For a binding x=foo the output is select (func('foo' as ?x) as ?y) when it should be select (func('foo') as ?y). The current code only works for select ?x ?y ?z type queries. Regex needs to be modified to ignore patterns that are preceeded by 'as'.

For users and especially developers getting familiar with the Skosmos codebase, it would help a lot to set up browsable API documentation generated using e.g. phpDocumentor.

Similar to this Annif issue

e.g. as per fnielsen/wembedder#13 .

As long as that does not exist, we could also link to https://arxiv.org/abs/1710.04099 to get things rolling.