6. 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 a user for the presentation, the user having a session copy of a user profile comprising user classifications; and filtering the structured document in dependence upon the user classifications of the session copy of a user profile and the classification identifiers.
6. 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 a user for the presentation, the user having a session copy of a user profile comprising user classifications; and filtering the structured document in dependence upon the user classifications of the session copy of a user profile and the classification identifiers. 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.