Make $object-metadata optional

Author: namedgraph

src/main/webapp/static/com/atomgraph/linkeddatahub/xsl/bootstrap/2.3.2/client/form.xsl

@@ -380,7 +380,7 @@ WHERE
                 <xsl:variable name="object-uris" select="distinct-values($resource/*/@rdf:resource[not(key('resources', .))])" as="xs:string*"/>
                 <xsl:variable name="query-string" select="$object-metadata-query || ' VALUES $this { ' || string-join(for $uri in $object-uris return '&lt;' || $uri || '&gt;', ' ') || ' }'" as="xs:string"/>
                 <xsl:variable name="request-uri" select="ac:build-uri(resolve-uri('sparql', $ldt:base), map{ 'query': $query-string, 'accept': 'application/rdf+xml' })" as="xs:anyURI"/>
-                <xsl:variable name="object-metadata" select="document($request-uri)" as="document-node()"/>
+                <xsl:variable name="object-metadata" select="if (doc-available($request-uri)) then document($request-uri) else ()" as="document-node()?"/>
                 <xsl:message>
                     $object-uris: <xsl:value-of select="$object-uris"/>
                     $object-metadata: <xsl:value-of select="serialize($object-metadata)"/>
@@ -797,7 +797,7 @@ WHERE
                 <xsl:variable name="object-uris" select="distinct-values($resource/*/@rdf:resource[not(key('resources', .))])" as="xs:string*"/>
                 <xsl:variable name="query-string" select="$object-metadata-query || ' VALUES $this { ' || string-join(for $uri in $object-uris return '&lt;' || $uri || '&gt;', ' ') || ' }'" as="xs:string"/>
                 <xsl:variable name="request-uri" select="ac:build-uri(resolve-uri('sparql', $ldt:base), map{ 'query': $query-string, 'accept': 'application/rdf+xml' })" as="xs:anyURI"/>
-                <xsl:variable name="object-metadata" select="document($request-uri)" as="document-node()"/>
+                <xsl:variable name="object-metadata" select="if (doc-available($request-uri)) then document($request-uri) else ()" as="document-node()?"/>
                 <xsl:message>
                     $object-uris: <xsl:value-of select="$object-uris"/>
                     $object-metadata: <xsl:value-of select="serialize($object-metadata)"/>