<!-- bf.uri is a simple way to get to a thing -->
<index type="bf.uri">
- ?thing rdf:type ?any FILTER( ?thing = %u ) </index>
+ ?thing rdf:type ?any FILTER( ?thing = %u )
+ </index>
+ <!-- bf.type is a simple way to search for types -->
+ <!-- for example, a bf.Work can also be bf:Text or bf:Audio -->
+ <index type="bf.type">
+ ?thing a %t
+ </index>
<!-- The BF-L present format is the same for everything -->
<!-- Each db is supposed to provide a dedicated BF-V present format -->
?subject bf:label %v FILTER(contains(%v, %s))
</index>
+ <!-- contentCategory can be searched with complete URIs like -->
+ <!-- http://id.loc.gov/vocabulary/contentTypes/txt -->
+ <index type="bf.contentcategory">
+ ?thing bf:contentCategory %u
+ </index>
<!-- Present formats -->
<!-- BF-L comes from the "thing" template -->
<!-- BF-V expands all links, even to instances but not other works -->
<present type="BF-V">
CONSTRUCT {
- %u ?rel ?wobj1 .
- ?wobj1 ?wrel1 ?wobj2 .
- ?wobj2 ?wrel2 ?wobj3 .
+ %u ?wrel1 ?wobj1 .
+ ?wobj1 ?wrel2 ?wobj2 .
+ ?wobj2 ?wrel3 ?wobj3 .
?inst ?irel1 ?iobj1 .
?iobj1 ?irel2 ?iobj2 .
?iobj2 ?irel3 ?iobj3
}
WHERE {
%u a bf:Work .
- %u ?rel ?wobj1 .
+ %u ?wrel1 ?wobj1 .
OPTIONAL {
?wobj1 ?wrel2 ?wobj2