facets.xml

<!-- This file centralizes the configuration of triples-based
     facets, including all aspects from loading the relevant triples
     into document properties, to creating the needed indexes, to
     rendering the facet names, to configuring which queries
     can be expanded.
-->
<facets>
  <facet name="cat"
         display="Article Category"
         index-name="category"
         type="string"
         collation="http://marklogic.com/collation/"
         rdf-property="http://s.opencalais.com/1/pred/categoryName">

    <!-- What triples to store with the document properties.
         This SPARQL query will get run once for each document
         (at build time). -->
    <sparql><![CDATA[

      CONSTRUCT {
        ?DocCat $facetProperty ?cat .
      }
      FROM <http://www.bbc.co.uk/news/graph>
      WHERE {
       ?DocInfo owl:sameAs $docId .
       ?DocCat c:docId ?DocInfo ;
               $facetProperty ?cat .
      }
    
    ]]></sparql>
  </facet>

  <facet name="org"
         display="Types of organizations mentioned"
         index-name="orgtype"
         type="string"
         collation="http://marklogic.com/collation/"
         rdf-property  ="http://s.opencalais.com/1/pred/organizationtype"
         expandable-via="http://s.opencalais.com/1/pred/name">

    <sparql id="relevance-based"><![CDATA[

      CONSTRUCT {
        ?thing $facetProperty ?thingtype .
      }
      FROM <http://www.bbc.co.uk/news/graph>
      WHERE {
        ?DocInfo owl:sameAs $docId .

        ?RelevanceInfo c:docId ?DocInfo ;
                       c:subject ?thing .

        ?thing $facetProperty ?thingtype .
      }

    ]]></sparql>
  </facet>

  <facet name="product"
         display="Product types mentioned"
         index-name="producttype"
         type="string"
         collation="http://marklogic.com/collation/"
         rdf-property  ="http://s.opencalais.com/1/pred/producttype"
         expandable-via="http://s.opencalais.com/1/pred/name"
         sparql-idref="relevance-based"/>

  <facet name="person"
         display="Types of people mentioned"
         index-name="persontype"
         type="string"
         collation="http://marklogic.com/collation/"
         rdf-property  ="http://s.opencalais.com/1/pred/persontype"
         expandable-via="http://s.opencalais.com/1/pred/name"
         sparql-idref="relevance-based"/>

  <facet name="event"
         display="Types of political events mentioned"
         index-name="politicaleventtype"
         type="string"
         collation="http://marklogic.com/collation/"
         rdf-property  ="http://s.opencalais.com/1/pred/politicaleventtype"
         expandable-via="http://s.opencalais.com/1/pred/name"
         sparql-idref="relevance-based"/>

  <sparql-prefixes><![CDATA[

    PREFIX c:   <http://s.opencalais.com/1/pred/>
    PREFIX owl: <http://www.w3.org/2002/07/owl#>

  ]]></sparql-prefixes>

</facets>