File formats, methods, and computer program products are provided for representing a presentation in a modular content framework. The modular content framework may include a file format container associated with modular parts. A file format includes logically separate modular parts that are associated with each other by one or more relationships where each modular part is associated with a relationship type. The modular parts include a presentation part representing a start part for the presentation, a slide master part associated with the presentation part, and a slide layout part associated with the slide master part. The modular parts may also include a document properties part containing built-in properties associated with the file format, a thumbnail part containing associated thumbnails, and a slide part containing a slide in the presentation. Each modular part is capable of being interrogated separately, extracted from the presentation, and/or reused in a different presentation.