23. A computer program product for differential dynamic content delivery, the computer program product comprising a storage device configured to store a plurality of computer instructions comprising: computer instructions, recorded on the storage device, for providing a session document for a presentation, wherein the session document includes a session grammar and a session structured document, the session document further including a first classified structural element and a second classified structural element received from a presenter; computer instructions, recorded on the storage device, for providing a session copy of a first user profile including a first user classification associated with a first classified structural element; computer instructions, recorded on the storage device, for providing a session copy of a second user profile including a second user classification associated with the first classified structural element; computer instructions, recorded on the storage device, for receiving, from the presenter, a user classification instruction to change the second user classification in the session copy of the second user profile; computer instructions, recorded on the storage device, for changing the second user classification to an altered user classification in the session copy of the second user profile to associate the second user classification with a second classified structural element in dependence upon the presenter's instruction, wherein the first user classification remains associated with the first classified structural element; computer instructions, recorded on the storage device, for presenting the second classified structural element to the second user in response to the second user classification becoming associated with the second classified structural element; and computer instructions, recorded on the storage device, for presenting the first classified structural element to the first user in response to the first user classification remaining associated with the first classified structural element.
23. A computer program product for differential dynamic content delivery, the computer program product comprising a storage device configured to store a plurality of computer instructions comprising: computer instructions, recorded on the storage device, for providing a session document for a presentation, wherein the session document includes a session grammar and a session structured document, the session document further including a first classified structural element and a second classified structural element received from a presenter; computer instructions, recorded on the storage device, for providing a session copy of a first user profile including a first user classification associated with a first classified structural element; computer instructions, recorded on the storage device, for providing a session copy of a second user profile including a second user classification associated with the first classified structural element; computer instructions, recorded on the storage device, for receiving, from the presenter, a user classification instruction to change the second user classification in the session copy of the second user profile; computer instructions, recorded on the storage device, for changing the second user classification to an altered user classification in the session copy of the second user profile to associate the second user classification with a second classified structural element in dependence upon the presenter's instruction, wherein the first user classification remains associated with the first classified structural element; computer instructions, recorded on the storage device, for presenting the second classified structural element to the second user in response to the second user classification becoming associated with the second classified structural element; and computer instructions, recorded on the storage device, for presenting the first classified structural element to the first user in response to the first user classification remaining associated with the first classified structural element. 29. The computer program product of claim 23 wherein the second classified structural element is selected in response to having an associated second classification identifier that corresponds to the second user classification in the session copy of the second user profile.