A web-based system, method and program product are provided for adding content to a content object stored (e.g., a custom compilation or prepublished work) in a data repository as a group of hierarchically related content entities. Each noncontainer content object is preferably stored as a separate entity...http://www.google.de/patents/US7076494?utm_source=gb-gplus-sharePatent US7076494 - Providing a functional layer for facilitating creation and manipulation of compilations of content
