PostgreSQL :: a formula-aware RDFLib Store based on AbstractSQLStore

PostgreSQL RDFLib Store, formula-aware implementation. It stores its triples in the following partitions (per AbstractSQLStore):

• Asserted non rdf:type statements
• Asserted rdf:type statements (in a table which models Class membership). The motivation for this partition is primarily query speed and scalability as most graphs will always have more rdf:type statements than others
• All Quoted statements

In addition it persists namespace mappings in a separate table