20. The computer program product of claim 19 wherein means, recorded on the recording medium, for identifying presentation documents for a presentation comprises: means, recorded on the recording medium, for creating a data structure representing a presentation; and means, recorded on the recording medium, for listing at least one presentation document in the data structure representing a presentation.
20. The computer program product of claim 19 wherein means, recorded on the recording medium, for identifying presentation documents for a presentation comprises: means, recorded on the recording medium, for creating a data structure representing a presentation; and means, recorded on the recording medium, for listing at least one presentation document in the data structure representing a presentation. 21. The computer program product of claim 20 wherein: means, recorded on the recording medium, for listing the at least one presentation document includes means, recorded on the recording medium, for storing a location of the presentation document in the data structure representing a presentation; and means, recorded on the recording medium, for storing each presentation grammar includes means, recorded on the recording medium, for retrieving a presentation grammar of the presentation document in dependence upon the location of the presentation document.