Malformed request with missing prefixes

[Mvwivs]

If client is missing some prefixes needed by schema, malformed response is build, which results in Bad request.

For example ArtifactShapeSchema requires rm and dcterms prefixes and result looks like this:

PREFIX jsld: <http://agentlab.ru/jsld_test#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX sh: <http://www.w3.org/ns/shacl#>
SELECT ?eIri0 ?targetClass0 ?title0 ?description0 ?inCreationMenu0 ?defaultIndividNs0 ?defaultFormat0 ?iconReference0 WHERE {
  ?eIri0 rdf:type sh:NodeShape;
    sh:targetClass ?targetClass0.
  OPTIONAL { ?eIri0 <undefinedtitle> ?title0. }
  OPTIONAL { ?eIri0 <undefineddescription> ?description0. }
  OPTIONAL { ?eIri0 <undefinedinCreationMenu> ?inCreationMenu0. }
  OPTIONAL { ?eIri0 <undefineddefaultIndividNs> ?defaultIndividNs0. }
  OPTIONAL { ?eIri0 <undefineddefaultFormat> ?defaultFormat0. }
  OPTIONAL { ?eIri0 <undefinediconReference> ?iconReference0. }
  FILTER(?targetClass0 = jsld:Person)
}

Client probably should receive error earlier, when provider was constructing request