Generating SPARQL: Mustache template

query.mustache

PREFIX foaf: <http://xmlns.com/foaf/0.1/>

SELECT ?person
       {{#properties}}
       (SAMPLE(?_{{varname}}) AS ?{{varname}})
       {{/properties}}
WHERE {
  {
    SELECT ?person
    WHERE {
      {
        SELECT DISTINCT ?person
        WHERE {
          ?person a foaf:Person .
          {{#properties}}
            {{#required?}}
            ?person <{{{property}}}> [] .
            {{/required?}}
          {{/properties}}
        }
        ORDER BY ?person
      }
    }
    LIMIT {{limit}}
    OFFSET {{offset}}
  }
  {{#properties}}
    {{^required?}} OPTIONAL { {{/required?}}
    ?person <{{{property}}}> ?_{{varname}} .
    {{^required?}} } {{/required?}}
  {{/properties}}
}
GROUP BY ?person