Common parent of Triple and Quad
Treat Triple and Quad as separate.
Common parent of blank node and IRI
The three parts
Create CONTRIBUTING.md
Update CONTRIBUTING.md
Remove TermTuple. asTriple -> toTriple
Use Optional<> for Literal.getLanguageTag
Possible operation for BlankNode. Discuss.
RDFTerm. Use Resource for 'blank node or IRI'
IRI extends RDFTerm
Term -> RDFTerm
Merge pull request #3 from afs/master

Possible changes