Which kinds of open source repository project has been used

[frankqu]

Hi all,
Which kinds of open source repository project has been used in Alfresco to build its content repository? I know Jackrabbit is a open source for repository. But I think Alfresco don't use it.

[zaizi]

Alfresco IS the content repository. Further information: http://wiki.alfresco.com/wiki/Alfresco_Repository_Architecture.

Ainga