Querying RDF query languages and execution. Provides classes to create query objects and to execute them over an RDF graph (#librdf_model) returning a #librdf_query_results Query result limits and offsets can be set. @world: @name: @uri_string: @factory: @world: @name: @uri: @query_string: @base_uri: @Returns: @old_query: @Returns: @world: @factory: @name: @uri: @query_string: @base_uri: @Returns: @query: @query: @model: @Returns: @query: @Returns: @query: @limit: @Returns: @query: @Returns: @query: @offset: @Returns: