<docbook><section><title>VirtSpongerLinkedDataHooksIntoSPARQLEx4</title><para> </para>
<title>Example with INPUT Pragma grab-depth</title>Example with INPUT Pragma grab-depth
<para>The following example demonstrates usage of the  grab-depth  pragma:</para>
<programlisting>DEFINE input:grab-var &quot;?more&quot;
DEFINE input:grab-depth 10
DEFINE input:grab-limit 100
DEFINE input:grab-base &quot;http://www.openlinksw.com/dataspace/kidehen@openlinksw.com/weblog/kidehen@openlinksw.com%27s%20BLOG%20%5B127%5D/1300&quot;
PREFIX foaf: &lt;http://xmlns.com/foaf/0.1/&gt;
PREFIX rdf: &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#&gt;
PREFIX rdfs: &lt;http://www.w3.org/2000/01/rdf-schema#&gt;

SELECT ?id ?firstname ?nick
WHERE 
  {
    GRAPH ?g {
               ?id rdf:type foaf:Person .
               ?id foaf:firstName ?firstname .
               ?id foaf:knows ?fn .
               ?fn foaf:nick ?nick .
               OPTIONAL { ?id rdfs:SeeAlso ?more }
            }
  }
LIMIT 10
</programlisting><itemizedlist mark="bullet" spacing="compact"><listitem><ulink url="http://bit.ly/YWQXOy">View the SPARQL Query Definition via SPARQL Protocol URL</ulink> </listitem>
<listitem><ulink url="http://bit.ly/YcQ8Aj">View the SPARQL Query Results via SPARQL Protocol URL</ulink></listitem>
</itemizedlist><bridgehead class="http://www.w3.org/1999/xhtml:h2">Sponger Usage Examples</bridgehead>
<itemizedlist mark="bullet" spacing="compact"><listitem><ulink url="http://docs.openlinksw.com/virtuoso/virtuososponger.html#virtuosospongerusageprocessorex">SPARQL Processor Usage Example</ulink> </listitem>
<listitem><ulink url="http://docs.openlinksw.com/virtuoso/virtuososponger.html#virtuosospongerusageproxyex2">RDF Proxy Service Example</ulink> </listitem>
<listitem><ulink url="http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtDeployingLinkedDataGuide_BrowsingNorthwindRdfView#AncMozToc2">Browsing &amp; Exploring RDF View Example Using ODE</ulink> </listitem>
<listitem><ulink url="http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtDeployingLinkedDataGuide_BrowsingNorthwindRdfView#AncMozToc3">Browsing &amp; Exploring RDF View Example Using iSPARQL</ulink> </listitem>
<listitem><ulink url="http://docs.openlinksw.com/virtuoso/rdfinsertmethods.html#rdfinsertmethodplapissimpleexample">Basic Sponger Cartridge Example</ulink> </listitem>
<listitem><ulink url="http://docs.openlinksw.com/virtuoso/virtuososponger.html#virtuosospongerusagebriefex">HTTP Example for Extracting Metadata using CURL</ulink> </listitem>
<listitem><ulink url="http://docs.openlinksw.com/virtuoso/virtuososponger.html#virtuosospongercartridgetypesmetarestexamples">RESTFul Interaction Examples</ulink> </listitem>
<listitem><ulink url="http://docs.openlinksw.com/virtuoso/sect5_virtuosospongercreatecustcartrrgstflickr.html">Flickr Cartridge Example</ulink> </listitem>
<listitem><ulink url="http://docs.openlinksw.com/virtuoso/virtuososponger.html#virtuosospongercreatecustcartrexmp">MusicBrainz Metadatabase Example</ulink> </listitem>
<listitem><ulink url="VirtTipsAndTricksGuideAddTriplesNamedGraph">SPARQL Tutorial -- Magic of  SPARUL and Sponger</ulink></listitem>
</itemizedlist><bridgehead class="http://www.w3.org/1999/xhtml:h2">Related</bridgehead>
<itemizedlist mark="bullet" spacing="compact"><listitem><ulink url="VirtSpongerLinkedDataHooksIntoSPARQL">Sponger&#39;s Linked Data Middleware Hooks into SPARQL</ulink> </listitem>
<listitem><ulink url="VirtSponger">Virtuoso Sponger</ulink> </listitem>
<listitem><ulink url="http://virtuoso.openlinksw.com/Whitepapers/html/VirtSpongerWhitePaper.html">Technical White Paper</ulink> </listitem>
<listitem><ulink url="VirtSpongerCartridgeSupportedDataSources">Supported Virtuoso Sponger Cartridges</ulink> </listitem>
<listitem><ulink url="SPARQLSponger">SPARQL Sponger</ulink> </listitem>
<listitem><ulink url="VirtInteractSpongerMiddlewareRESTPatterns">Interacting with Sponger Middleware via RESTful Patterns</ulink> </listitem>
<listitem><ulink url="VirtSpongerCartridgeSupportedDataSourcesMetaRESTExamples">Interacting with Sponger Meta Cartridge via RESTful Patterns</ulink> </listitem>
<listitem><ulink url="VirtSpongerCartridgeRDFExtractor">Sponger Cartridge RDF Extractor</ulink> </listitem>
<listitem><ulink url="RDFMappers">Extending SPARQL IRI Dereferencing with RDF Mappers</ulink> </listitem>
<listitem><ulink url="VirtSpongerCartridgeProgrammersGuide">Programmer Guide for Virtuoso Linked Data Middleware (&quot;Sponger&quot;)</ulink> </listitem>
<listitem><ulink url="VirtProgrammerGuideRDFCartridge">Create RDF Custom Cartridge Tutorial</ulink> </listitem>
<listitem><ulink url="VirtSpongerCartridgeSupportedDataSources">OpenLink-supplied Virtuoso Sponger Cartridges</ulink> </listitem>
<listitem><ulink url="VirtAuthServerUI">Virtuoso Authentication Server</ulink> </listitem>
<listitem><ulink url="VirtOAuthSPARQL">Virtuoso SPARQL OAuth Tutorial</ulink> </listitem>
<listitem><ulink url="VirtSpongerACL">Virtuoso Sponger Access Control List (ACL) Setup</ulink> </listitem>
<listitem><ulink url="VirtSPARQLSecurityWebID">WebID Protocol &amp; SPARQL Endpoint ACLs Tutorial</ulink> </listitem>
<listitem><ulink url="http://docs.openlinksw.com/virtuoso/virtuososponger.html">Virtuoso Documentation</ulink></listitem>
</itemizedlist></section></docbook>