Ontotext
GraphDB is a family of highly efficient, robust, and scalable RDF databases. It streamlines the load and use of linked data cloud datasets, as well as your own resources. For easy use and compatibility with the industry standards, GraphDB implements the RDF4J framework interfaces, the W3C SPARQL Protocol specification, and supports all RDF serialization formats. The database offers open source API and it is the preferred choice of both small independent developers and big enterprise organizations because of its community and commercial support, as well as excellent enterprise features such as cluster support and integration with external high-performance search applications – Lucene, Solr, and Elasticsearch. GraphDB is build 100% on Java in order to be OS Platform independent.
GraphDB is one of the few triplestores that can perform semantic inferencing at scale, allowing users to derive new semantic facts from existing facts. It handles massive loads, queries, and inferencing in real-time.
GDB Architecture
GraphDB Workbench
Workbench (https://graphdb.ontotext.com/documentation/enterprise/workbench.html) is the GraphDB web-based administration tool. The user interface is similar to the RDF4J Workbench Web Application, but with more functionality.
GraphDB Engine
The GraphDB Workbench REST API can be used for managing locations and repositories programmatically, as well as managing a GraphDB cluster. It includes connecting to remote GraphDB instances (locations), activating a location, and different ways for creating a repository.
It includes also connecting workers to masters, connecting masters to each other, as well monitoring the state of a cluster.
GraphQL access via Ontotext Platform 3
GraphDB enables Knowledge Graph access and updates via GraphQL. GraphDB is extended to support the efficient processing of GraphQL queries and mutations to avoid the N+1 translation of nested objects to SPARQL queries.
Ontotext offers three editions of GraphDB: Free, Standard, and Enterprise.
GraphDB Free (https://www.ontotext.com/products/graphdb/graphdb-free/) – commercial, file-based, sameAs & query optimizations, scales to tens of billions of RDF statements on a single server with a limit of two concurrent queries.
GraphDB Standard Edition (SE) (https://www.ontotext.com/products/graphdb/graphdb-standard/) – commercial, file-based, sameAs & query optimizations, scales to tens of billions of RDF statements on a single server and an unlimited number of concurrent queries.
GraphDB Enterprise Edition (EE) (https://www.ontotext.com/products/graphdb/graphdb-enterprise/) – high-availability cluster with worker and master database implementation for resilience and high-performance parallel query answering.