LinkedDataHub is a Knowledge Graph application platform by\n AtomGraph that fully exploits the federated features of RDF and SPARQL.\n It can also be used as an RDF-native content management platform.

LinkedDataHub is an open source project that has its roots as a Linked Data publishing framework. However, since the 3.x release we have focused on Linked Data consumption, as we consider\n publishing a solved problem but continue to see a shortage of user-friendly consumption tools.

Low code application platform

LinkedDataHub is also a low code RDF Knowledge Graph application platform. It offers comprehensive development and management features:

rich UI component library that can be customized without writing program code
SPARQL-based templates for instance creation and editing forms (constructors)
SPIN and SHACL constraints for validation of incoming data
authentication using WebID and OpenID Connect
access control using WAC authorizations

Checkout the user guide on application building.

Federated knowledge management and collaboration system

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As an RDF-native CMS, LinkedDataHub provides a number of features for end-users:

creating structured content from Linked Data and SPARQL resources (new in 3.x)
creating RDF documents (graphs)
browsing Linked Data
forking RDF resources to the local dataspace (new in 3.x)
searching and querying SPARQL endpoints
creating collections from SPARQL queries
editing remote and local RDF documents
importing CSV data by mapping it to RDF using SPARQL
visualizing query results as graphs, charts etc.

Architecture

Architecturally LinkedDataHub is a read-write RDF Graph Store combined with a rich Linked Data/SPARQL client. LinkedDataHub does not persist RDF data itself but rather serves it from, and stores it in,\n a backing triplestore, which by default is the Apache Jena Fuseki.

Every document in LinkedDataHub's dataspace is also a named graph in the Graph Store and has both RDF and HTML representations. The client is implemented using XSLT 3.0, a standard, declarative data transformation language. It can connect to any Linked Data resource or SPARQL 1.1 endpoint.

Since version 3.x LinkedDataHub does not use the Linked Data Templates anymore. However they can still be used to publish Linked Data from SPARQL endpoints\n using Processor.

You can find the changelog here.