The document master is the highest class in the complex hierarchy (see also Complex document object). It contains the revision independent information for the document, which is made up from a number of common interfaces as described below.
In the core SmartPlant Foundation schema, there are two pre-configured revisable document classes: a template document class that is used for storing templates for reports and a general design document class.
The interfaces are arranged in a comprehensive hierarchy for the document master class definitions of these two documents. The design document master realizes the ISPFDesignDocMaster interface and a template document master realizes the ISPFTemplateMaster. These are their primary interfaces. All other interfaces implied by these two can also be realized by any document master class definition. Most of the interfaces realized are required so that they are automatically instantiated and attached to the document master when it is created.