Package org.aksw.jena_sparql_api.views

Class SparqlifyConstants

java.lang.Object
org.aksw.jena_sparql_api.views.SparqlifyConstants
public class SparqlifyConstants extends Object
Problem: Create V1 { ?s label ?o2 . } ?s = Uri(id); ?o1 = Uri(uri); Select id, concat("abc", u) as uri From tab1; Create V2 { ?s label ?o2 . } ?s = Uri(id); ?o2 = PlainLiteral(name); Select id, name From tab2; Select { ?x label ?y } The problem is, that ?y is mapped to both o1 and o2. However, the layout differs (o1 is a Uri, o2 is a Plain Literal). Resultset formats: a) A separate column for each possible part of an RDF variable. s_type s_value, o_type, o_value, o_lang, o_datatype, ... b) A column indicating the source view (bit-pattern) c) Each variable may be created from multiple columns ?s Select view_1_id, view_5_id ... d) Create View Products { ?s a Product . ?s rdfs:label ?name . ?s x:code ?code . } With ?s = Uri(Concat("http://", ?id)) ?name = ?code = Select id, name, code From product;