gStore is an open source database system (usually called Triple Store) for RDF knowledge graphs.developed by the Data Management Lab of Institute of Computer and Science, Peking University. Different from the traditional relational database-based knowledge graph data management, gStore is a native RDF data management system based on the Native Graph Model, which maintains the graph structure of the original RDF knowledge graph; its data model is labeled, directed multilateral graph with each vertex corresponding to a subject or object. We transform the SPARQL query for RDF into a subgraph matching query for RDF graphs, and use our proposed graph structure based index (VS-tree) to accelerate the performance of the query.

gStore has the following features:

1. gStore stores and retrieves RDF knowledge graph data from a graph database perspective.

2. gStore supports the SPARQL 1.1 standard defined by W3C, including queries containing Union, OPTIONAL, FILTER and aggregate functions; gStore supports effective insert, delete and update operations.

3. The gStore stand-alone unit can support the data management task of the 1 Billion triple-scale RDF knowledge graph.

gStore related academic papers are published in the world's top journals and conferences such as VLDB, VLDB Journal, etc., see Publications.