Mechanisms and techniques provide a system that operates in a computerized device to index content. Such a system allows registration of content indexing services and then receives repository content of at least one type. The system identifies a content indexing service associated with the at least one type of repository content from the set of available content indexing services. The system operates the content indexing service on the repository content to produce classification data or metadata derived from the repository content in addition to original classification data. The system then associates the classification data to a registry of classification data to allow indexing access to the repository content based on the classification data. By automatically indexing content, more comprehensive indexing is supported.