A JCR is a type of object database tailored to storing, searching, and retrieving hierarchical data.
In this way nodes in a JCR offer both referential integrity and object-oriented concept of inheritance.
Both JSRs are led by David Nüscheler of Adobe Systems (formerly of Day Software).
Adobe Experience Manager (AEM), Jahia, Hippo CMS and Magnolia are Enterprise Content Management systems built on the JCR API, using Jackrabbit as its repository by default, but able to plug in any other JSR-170 certified repository implementation.
Alfresco is an open source content management system which provides a JCR API onto their repository.
GX released the new community version of its Web enterprise content management (ECM) platform based natively on Apache Jackrabbit and JSR.