sub:assertion {
  sub:get-all-us dct:description "This query returns all user stories." ;
    dct:license <http://www.apache.org/licenses/LICENSE-2.0> ;
    a <https://w3id.org/kpxl/grlc/grlc-query> ;
    rdfs:label "Get user stories" ;
    <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 np: <http://www.nanopub.org/nschema#>
PREFIX npa: <http://purl.org/nanopub/admin/>
PREFIX npx: <http://purl.org/nanopub/x/>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
PREFIX dct: <http://purl.org/dc/terms/>
PREFIX prov: <http://www.w3.org/ns/prov#>

SELECT ?n1 ?label ?thing ?date where {
GRAPH npa:graph {
  ?n1 npx:introduces ?thing .
    ?n1 npx:hasNanopubType <https://w3id/fff/req/User-Story> .
    ?n1 npa:hasValidSignatureForPublicKey ?pubkey .
    filter not exists {
      ?np2 npx:invalidates ?n1 ;
            npa:hasValidSignatureForPublicKey ?pubkey .
    }
    ?n1 dct:created ?date .
    ?n1 rdfs:label ?label .
  }
}""" .
}