JeCARS - Java Extendable Contents And Rights System

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JeCARS is a RESTful webservice which delivers pluggable output formats, e.g. Atom feeds or HTML. Third party applications can be plugged in. A JCR (JSR-170) repository (Jackrabbit) is used for storage.

Current version: 0.2
JeCARS Overview

JeCARS enables thirds party applications to become a RESTful webservice, using Apache's Jackrabbit to become a full JSR-170 compatible repository.

JeCARS features;

Apache License v2.0
User and group (group of groups) management
Rights management (ACL).
Pluggable output formats
Pluggable versioning (default JCR versioning support)
RESTful interface
Plugin system (ApplicationSources) for publishing third party objects
Full text search
JSR-170 JCR (Java Content Repository) support
Atom Syndication Format (RFC 4287)
Atom Publishing Protocol (draft)
Google's GData support (http://code.google.com/apis/gdata), GData auth. support
Threaded Tool support