sub:assertion {
  sub:test-query dct:description "This is just a test query, updated three times..." ;
    dct:license <http://www.apache.org/licenses/LICENSE-2.0> ;
    a <https://w3id.org/kpxl/grlc/grlc-query> ;
    rdfs:label "test query" ;
    <https://w3id.org/kpxl/grlc/endpoint> <https://w3id.org/np/l/nanopub-query-1.1/repo/full> ;
    <https://w3id.org/kpxl/grlc/sparql> """prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
prefix dct: <http://purl.org/dc/terms/>
prefix np: <http://www.nanopub.org/nschema#>
prefix npa: <http://purl.org/nanopub/admin/>
prefix npx: <http://purl.org/nanopub/x/>
prefix grlc: <https://w3id.org/kpxl/grlc/>

select ?np ?label ?pubkeyhash ?date where {
  graph npa:graph {
    ?np npa:hasValidSignatureForPublicKeyHash ?pubkeyhash .
    filter not exists { ?npx npx:invalidates ?np ; npa:hasValidSignatureForPublicKeyHash ?pubkeyhash . }
    ?np dct:created ?date .
    ?np npx:introduces ?query .
    ?np np:hasAssertion ?a .
    ?np npx:hasNanopubType grlc:grlc-query .
    optional { ?np rdfs:label ?label }
  }
  graph ?a {
    ?query grlc:endpoint ?endpoint .
    filter(strstarts(str(?endpoint), \"https://w3id.org/np/l/nanopub-query\"))
  }
} order by desc(?date)""" .
}