Comparing the planned feature of the different (proposed) incubating Apache Projects

Feature

Jena

Clerezza

Stanbol

Performant and scalable storage of triples

X

Default Distros include Jena TDB or Sesame

SPARQL Endpoint

X

Distributing queries to backends

Delegated to Clerezza

Java API for accessing and manipulating RDF graphs

X

X

Scala DSL for accessing and manipulating RDF Graphs

X

Generic mechanism to transform RDF data to any format

X

Support for categorizing resources using SKOS

X

?

SPI for systems providing suggestion for the categorization of Information Resources

X

X

Exposing RDF data over a REST API with Conneg

X

X

Extensability and customization of Rest API base on URI-Path

X

Extensability and customization of Rest API base on RDF -Type of Resource

X

Inferencing support (OWL)

X

RDF rules language

X

X (with delegation to inference engines)

Parsers for RDF serializations

X

X (Formats supported by Jena, RDFa, RDF/JSON)

Writers for RDF serializations

X

X (Formats supported by Jena, RDF/JSON, and stable n-triples)

X (some prototype for JSON-LD that will either move to Clerezza or to Jena)

Support for multiple storage backends

X

X

(Delegated to Clerezza)

Authentication and Authorization Framework

X

Social Web features (WebId, OpenId, user specific graphs)

X

Social Distance Based Authorization

Planned

OSGi service to chain engines that analyze text and output results as RDF

X

OSGi service to syndicate, map and cache remote linked open data sources (dbpedia, freebase, ...)

cache for dbpedia or other skos taxonomy sparql-service.

X

OSGi service to suggest mapping with linked data entities based on similarity queries on lucene/solr fulltext indices of entities

X