An application object is defined in Data Capture to control the external application that is launched in order to extract the data content from a file. A file type is related to a reader interface, which in turn is related to an application object. By default, the file type .dwg is related to the reader interface ISPFNDrawingReader, which is related to the SmartConverter application object. Therefore, SmartConvertor is used to extract the data from the .dwg files. However, if you want to use SmartPlant Markup to extract data from a drawing, then you can attach the SmartPlant Markup application object to the ISPFNDrawingReader interface, instead of the default SmartConvertor object.
When an individual file type needs to be processed differently than the other file types in the same group, you can attach a SmartPlant Foundation file type directly to an application. For example, if the .dwg file type, which normally uses the application attached to the ISPFNDrawingReader interface, needs to be treated differently, then you can relate it directly to an application object, such as SmartPlant Markup.
If a file type is related directly to an application object, then this relationship
takes precedence over application object related though a reader interface.
This diagram shows the relationship between the application objects, readers, and file types.
