A triplestore or RDF store is a type of database built and optimized for storing Semantic triples (RDF triples) (subject–predicate–object). It can be queried through semantic queries.
See List of databases, .
Also known as storing quads where graph is fourth or zeroth -iple.
See the good answer by FrobberOfBits and some comments by Joshua Taylor on StackOverflow Graph Databases vs Triple Stores - when to use which? https://stackoverflow.com/a/30167732