14. The system as recited in claim 7 wherein the structured electronic document manager is further configured to store the structured electronic document on a portable memory medium.
7. A computer-implemented system, comprising: a processor; and a computer readable memory having embodied thereon: a candidate content item repository having one or more content items that can be included in a structured electronic document; a copy module configured to derive a base supplemental content item from a selected one of the candidate content items and further configured to designate a unique identifier for the base supplemental content item and to derive an annotated supplemental content item from the base supplemental content item wherein the annotated supplemental content item includes at least one annotation and a subset of content from the base supplemental content item and a plurality of annotations and the reference references a sequentially first annotation in the annotated supplemental content item; a document editor configured to receive the unique identifier and to insert the unique identifier into a reference to the base supplemental content in a primary document and to insert another reference including another unique identifier of the annotated supplemental content item into the primary document, wherein the reference is a link and wherein the unique identifier is a globally unique identifier or a hash of a filename; and a structured electronic document manager configured to create the structured electronic document by assembling the primary document, the base supplemental content item and the annotated supplement content item by converting a format of the primary document to another format and locking the structured electronic document to prevent further editing.