Creating, Attaching, and Embedding Extension Files

Extensions can be in independent *.xem files that are attached to models or can be embedded in model files. Independent extension files can be referenced by multiple models, and any changes made to such a file are shared by all models that attach it. Changes made to extensions embedded in a model file affect only that model.

• Creating an Extension File
  You can create an extension file from the list of extension files or directly embedded in your model.
• Attaching Extensions to a Model
  You can attach an extension file (.xem) to your model at the creation of the model by clicking the Select Extensions button on the New Model dialog. You can subsequently attach an extension file to your model at any time from the List of Extensions.
• Exporting an Embedded Extension File for Sharing
  If you export an XEM created in a model, it becomes available in the List of Extensions, and can be shared with other models. When you export an XEM, the original remains embedded in the model.
• Extension Properties
  All extension filess have the same basic category structure.