8. The method of claim 1 further comprising updating a session document, including: identifying a presentation document for the presentation, the presentation document including a presentation grammar and a structured document having structural elements classified with classification identifiers; identifying the second user for the presentation, the second user having said second session copy of the second user profile comprising the second user classification; and filtering the structured document in dependence upon the second user classification of the session copy of the second user profile and the classification identifiers.
9. The method of claim 8 wherein filtering the structured document comprises: extracting, from the structured document, structural elements having classification identifiers corresponding to the second user classification of the session copy of the second user profile; and writing the extracted structural elements into the session structured document in the session document.