Please can somebody tell me if i am understanding the above correctly?
A content management system can hold data/ files of almost any type, provide version control amongst many other features that a relational database.

A content repository such as jackrabbit is used to link to the content management system , a bit like Jdbc connection.

I was believing the above till i read some article that made a content repository sound the same as a content management system??

Any help would be appreciated!!

Thanks Neil

The content repository itself is intended only as a common substrate for developing content-driven applications. It provides the developer with a core set of content-related services:

Defining arbitrary content types. 
Common storage of content items (each item consists of a text or binary data with additional attributes as specified by the content type). 
Establishing relationships among items of any type. 
Versioning 
Consistent interaction with other services included in the ACS core, including permissions, workflow and object relationships. 
Categorization 
Searching