Query to use Service Description vocabulary to find metadata on named graphs

display_named_graphs.rq

PREFIX rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs:    <http://www.w3.org/2000/01/rdf-schema#>
PREFIX skos:    <http://www.w3.org/2004/02/skos/core#>
PREFIX skosxl:  <http://www.w3.org/2008/05/skos-xl#>
PREFIX xsd:     <http://www.w3.org/2001/XMLSchema#>
PREFIX dc:      <http://purl.org/dc/elements/1.1/>
PREFIX dcterms: <http://purl.org/dc/terms/>
PREFIX dcat:    <http://www.w3.org/ns/dcat#>
PREFIX wd:      <http://www.wikidata.org/entity/>
PREFIX wdt:     <http://www.wikidata.org/prop/direct/>
PREFIX aat:     <http://vocab.getty.edu/aat/>
PREFIX gvp:     <http://vocab.getty.edu/ontology#>
PREFIX sd:      <http://www.w3.org/ns/sparql-service-description#>
 
SELECT DISTINCT ?NamedGraph ?modified ?issued ?publisher ?status
FROM <https://sparql.vanderbilt.edu/graphs>
WHERE {
?Service sd:endpoint <https://sparql.vanderbilt.edu/sparql>.
?Service sd:availableGraphs ?GraphCollection.
?GraphCollection sd:namedGraph ?NamedGraph.
?NamedGraph dcterms:modified ?modified.
optional {?NamedGraph dcterms:issued ?issued.}
optional {?NamedGraph dc:publisher ?publisher.}
optional {?NamedGraph <http://rs.tdwg.org/dwc/terms/attributes/status> ?status.}                        
}
order by desc(?issued)