sub:assertion {
  sub:get-latest-nanopubs-from-pubkeys dct:description "This query returns the latest nanopublications from the given set of pubkey hashes." ;
    dct:license <http://www.apache.org/licenses/LICENSE-2.0> ;
    a <https://w3id.org/kpxl/grlc/grlc-query> ;
    rdfs:label "Get the latest nanopublications from pubkeys" ;
    <https://w3id.org/kpxl/grlc/endpoint> <https://w3id.org/np/l/nanopub-query-1.1/repo/empty> ;
    <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/>

select ?np ?label ?pubkey ?date where {

  bind(replace(str( ?__endpoint_iri ), \"/repo/.*$\", \"/repo/\") as ?servicebase)

  #==================== MULTI-VALUE PLACEHOLDER =====================#------ config: ------
  { select ?pkh {                                                    # <- VAR pkh
    bind(?_pubkeyhashes as ?vs)                                      # <- VAR _pubkeyhashes
    {select*{optional{?a ?b ?c}}limit 1} # (for some Virtuoso ver.)  #
    values ?x {0 1 2 3 4 5 6 7 8 9} values ?y {0 1 2 3 4 5 6 7 8 9}  #
    bind((10*?x)+?y as ?n) # (works up to a maximum of 100 values)   #
    bind(\" \" as ?sep) # (separator as single regex-compatible char)  # <- CONST sep
    bind(concat(\"^([^\",?sep,\"]*\",?sep,\"){\",str(?n),\"}\") as ?p)       #
    bind(concat(?sep,\".*\") as ?p0)                                   #
    filter(if(?n=0,true,regex(?vs,?p))) # (?n=0 check for Viruoso)   #
    bind(replace(if(?n=0,?vs,replace(?vs,?p,\"\")),?p0,\"\") as ?pkh)    # <- VAR pkh
  } }                                                                #
  #==================================================================#---------------------
  bind(uri(concat(?servicebase, \"pubkey/\", ?pkh)) as ?service)
 
  service ?service {
    graph npa:graph {
      ?np rdfs:label ?label ;
          npa:hasValidSignatureForPublicKey ?pubkey ;
          dct:created ?date .
      filter not exists { ?npx npx:invalidates ?np ; npa:hasValidSignatureForPublicKey ?pubkeyx . filter(contains(?_pubkeyhashes, sha256(str(?pubkeyx)))) }
      filter not exists { ?np npx:hasNanopubType npx:ExampleNanopub . }
      filter not exists { ?np npx:hasNanopubType npx:retracts . }
    }
  }
}
order by desc(?date)
limit 100""" .
}