Wiktionary
content repository
n. (context computing English) The main repository of a content management system
Wikipedia
Content repository
A content repository or content store is a database of digital content with an associated set of data management, search and access methods allowing application-independent access to the content, rather like a digital library, but with the ability to store and modify content in addition to searching and retrieving. The content repository acts as the storage engine for a larger application such as a Content Management System or a Document Management System, which adds a user interface on top of the repository's application programming interface.