US Patent 7757168 Meta-document and method of managing

A system includes a meta-document, i.e., a document including content information which has a set of document service requests associated with it. A document service is a process which uses a portion of the document content as a starting point to obtain other information pertaining to that content. A scheduler selects a document service request from the set, then initiates and manages managing communication with a service provider to satisfy the selected document service. Any results received from the selected document service are integrated into the document.