RDF Database Library - slide "Algae Query Data Structure"

algae parser produces a data structure to represent the graph query
all triples-store queries langauges represent a graph
other query formats can produces the same structure and leverage off the database query support

for example, there is support ILRT strawman (prolog inspired query format)

{http://...#type} (FRIEND , http://...#Friend)
{http://...#Address} (FRIEND , ADDRESS)
{http://...#Street} (ADDRESS , STREET)