Abstract: An open file format is used to represent the features and data associated with a presentation application within a document. The file format simplifies the way a presentation application organizes document features and data, and presents a logical model that is easily accessible. The file format is made up of a collection of modular parts that are stored within a container. The content included in the modular parts may include XML. This content allows tools to interrogate a presentation to examine and utilize content and ensure that the file is written correctly. Each modular part is capable of having information extracted from it and copied into another document and reused. Information may also be changed, added, and deleted from each of the modular parts.