23. The system of claim 21 wherein the at least one processor is further programmed to create a session document from a presentation document, at least in part by: identifying a presentation document for a presentation, the presentation document including a presentation grammar and a structured document having structural elements classified with classification identifiers; identifying a user participant for the presentation, the user participant having a user profile comprising user classifications; and filtering the structured document in dependence upon the user classifications and the classification identifiers.
23. The system of claim 21 wherein the at least one processor is further programmed to create a session document from a presentation document, at least in part by: identifying a presentation document for a presentation, the presentation document including a presentation grammar and a structured document having structural elements classified with classification identifiers; identifying a user participant for the presentation, the user participant having a user profile comprising user classifications; and filtering the structured document in dependence upon the user classifications and the classification identifiers. 25. The system of claim 23 wherein the at least one processor is further programmed to create a presentation document, at least in part by: creating, in dependence upon an original document, a structured document comprising one or more structural elements; classifying a structural element of the structured document according to a presentation attribute; and creating a presentation grammar for the structured document, wherein the presentation grammar for the structured document includes grammar elements each of which includes an identifier for at least one structural element of the structured document.