A system for reuse of content within documents can include storage media on which a document graph is stored, and indexing software that, when executed by a processing system, directs the processing system to at least: identify content component types within a source document; and represent content components in a document graph at least connected by ‘contains’ edge to source document. A search of the document graph for reusable content can then be directed to related content components including those of a particular content component type or relevancy.