When content producers are forced to generate and manage content day after day (and, most of the time, in a hurry), as in the case of TV broadcasters, they have different priorities and requirements than other kinds of content providers. However, the requirement for content interchange through optimum content search is always there. The paper presents how the issue of interoperability of metadata and digital rights information is solved in a specific project, the XAC (Xarxa IP Audiovisual de Catalunya, Audiovisual IP Network of Catalonia), where producers of TV programmes are the main involved content owners. After an analysis of how these content providers manage metadata and rights information, a specific proposal fulfilling providers' requirements and International Standards, the XAC Metadata Set (XAC-MS), is described. This is the basis for implementing a system for multimedia content interchange that could be extended to other kinds of multimedia publishing.