sub:assertion {
  sub:get-pre-registrations dct:description "This query returns all pre-registrations" ;
    dct:license <http://www.apache.org/licenses/LICENSE-2.0> ;
    a <https://w3id.org/kpxl/grlc/grlc-query> ;
    rdfs:label "Get pre-registrations" ;
    <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/>

select ?thing ?label ?np ?date where {
  graph npa:graph {
    ?np npa:hasValidSignatureForPublicKey ?pubkey .
    filter not exists { ?npx npx:invalidates ?np ; npa:hasValidSignatureForPublicKey ?pubkey . }
    ?np dct:created ?date .
    ?np np:hasAssertion ?a .
  }
  graph ?a {
    ?thing <https://w3id.org/fdof/ontology#hasInformationObjectType> <https://w3id.org/gff/rao/terms/Pre-Registration> .
    ?thing rdfs:label ?label .
    filter(contains(?label, ?_searchterm))
  }
}""" .
}