sub:assertion {
  sub:get-head-np-info dct:description "This query returns some basic info - creator, author, label, etc. - on the head version of a nanopublication, i.e. the user-generated original version or - if available - a publisher-accepted version at a journal." ;
    dct:license <http://www.apache.org/licenses/LICENSE-2.0> ;
    a <https://w3id.org/kpxl/grlc/grlc-query> ;
    rdfs:label "Get info on the head version of a nanopublication" ;
    <https://w3id.org/kpxl/grlc/endpoint> <https://w3id.org/np/l/nanopub-query-1.1/repo/full> ;
    <https://w3id.org/kpxl/grlc/sparql> """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 rdfs: <http://www.w3.org/2000/01/rdf-schema#>
prefix nt: <https://w3id.org/np/o/ntemplate/>
prefix bibo: <http://purl.org/ontology/bibo/>
prefix pav: <http://purl.org/pav/>
prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
prefix prov: <http://www.w3.org/ns/prov#>

select ?head_version_np ?author_version_np ?publisher_version_np ?np_type ?journal_name ?creator ?main_creator_or_author ?main_author ?author_count ?label ?date ?author_version_date {

{ select ?head_version_np ?author_version_np ?publisher_version_np ?np_type ?journal_name ?author_version_date where {

graph npa:graph {
  bind(replace(str(?_np_iri), \"^.*[^a-zA-Z0-9-_](RA[a-zA-Z0-9-_]{43})$\", \"$1\") as ?ac)
  ?author_version_np npa:artifactCode ?ac .
  ?author_version_np dct:created ?author_version_date .
}

optional {

  values (?np_type ?journal_name ?pubkeys) {
    (<https://w3id.org/kpxl/pensoft/rio/terms/RIOJournalNanopub> \"RIO Journal\" \"1162349fdeaf431e71ab55898cb2a425b971d466150c2aa5b3c1beb498045a37 cfe248c38933693b1ddeb62e17976a4d2396b0c738af5356bfffbe559d1a3de0 170211c91a70e67992d52c760de3f0052c8c7271bd3c225ef0347245e8517ff6\")
    (<https://w3id.org/kpxl/pensoft/bdj/terms/BiodiversityDataJournalNanopub> \"Biodiversity Data Journal\" \"1162349fdeaf431e71ab55898cb2a425b971d466150c2aa5b3c1beb498045a37 cfe248c38933693b1ddeb62e17976a4d2396b0c738af5356bfffbe559d1a3de0 170211c91a70e67992d52c760de3f0052c8c7271bd3c225ef0347245e8517ff6\")
    (<https://w3id.org/kpxl/ios/ds/terms/DataScienceNanopub> \"Data Science\" \"1162349fdeaf431e71ab55898cb2a425b971d466150c2aa5b3c1beb498045a37 cfe248c38933693b1ddeb62e17976a4d2396b0c738af5356bfffbe559d1a3de0 170211c91a70e67992d52c760de3f0052c8c7271bd3c225ef0347245e8517ff6\")
  }
 
  bind(uri(concat(\"https://w3id.org/np/l/nanopub-query-1.1/repo/type/\", sha256(str(?np_type)))) as ?service)
  service ?service {
    graph npa:graph {
      ?publisher_version_np npa:hasValidSignatureForPublicKey ?pubkey .
      ?publisher_version_np np:hasPublicationInfo ?i .
      filter not exists { ?publisher_version_np npx:hasNanopubType npx:ExampleNanopub . }
      filter not exists { ?npx npx:invalidates ?publisher_version_np ; npa:hasValidSignatureForPublicKey ?pubkey . }
      filter(contains(?pubkeys, sha256(?pubkey)))
    }
    graph ?i {
      ?publisher_version_np prov:wasDerivedFrom ?author_version_np .
    }
  }
}

} }

bind(coalesce(?publisher_version_np, ?author_version_np) as ?head_version_np)
bind(?head_version_np as ?np)

{ select distinct ?np (coalesce(?signer, min(?declaredCreator)) as ?creator) (coalesce(?firstAuthor, min(?author), min(?creator)) as ?main_author) (if(count(distinct ?author)>0,count(distinct ?author),count(distinct ?creator)) as ?author_count) ?label ?date where {
  graph npa:graph {
    ?np dct:created ?date .
    ?np npa:hasValidSignatureForPublicKey ?pubkey .
    ?np rdfs:label ?label .
    ?np np:hasPublicationInfo ?i .
    ?np dct:creator ?declaredCreator .
    optional { ?np npx:signedBy ?signer . }
  }
  optional {
    graph ?i { ?np pav:authoredBy ?author . }
  }
  optional {
    graph ?i {
      ?np bibo:authorList ?authorList .
      ?authorList ?hasElement ?author .
      filter(strstarts(str(?hasElement), str(rdf:_)))
    }
  }
  optional {
    graph ?i {
      ?np bibo:authorList ?authorList .
      ?authorList rdf:_1 ?firstAuthor .
    }
  }
} group by ?np ?signer ?introducedThing ?label ?date ?firstAuthor }

}""" .
}