7. The method of claim 6 wherein filtering the structured document comprises: extracting, from the structured document, structural elements having classification identifiers corresponding to the user classifications of the session copy of a user profile; and writing the extracted structural elements into the session structured document in the session document.
7. The method of claim 6 wherein filtering the structured document comprises: extracting, from the structured document, structural elements having classification identifiers corresponding to the user classifications of the session copy of a user profile; and writing the extracted structural elements into the session structured document in the session document. 8. The method of claim 7 further comprising filtering the presentation grammar, in dependence upon the extracted structural elements, into a session grammar in the session document.