A data structure, document data stream, method and apparatus for identifying resources prior to printing. A print data stream structure is provided that can be specified at the beginning of a document or job, or on any page boundary in a document or job, and that identifies complex resources that are...http://www.google.co.uk/patents/US6992785?utm_source=gb-gplus-sharePatent US6992785 - Method, data structure and apparatus for identifying resources prior to printing