Extensions

Extensions (.xem files) provide means for customizing and extending PowerDesigner metaclasses, parameters, and generation. Extended models can be used to store additional information, or to change model behavior.

When you use the models provided with RAP, the extensions are present. When you create a new model using the RAP model category set, extensions are applied automatically.

When you create a new model without using the RAP Model categories, or when you have an existing model, you can extend it using PowerDesigner tools and RAP extension files.

• Category Set
  The RAP category set lets you easily create any RAP model type.
• Message Definitions
  A message definition in the RAP Messages model represents a RAP data stream template.
• Message Templates
  Message templates, also called RAP data stream (RDS) templates, are XML documents that represent the data structure of specific message types.
• Impact Analysis
  PowerDesigner provides powerful tools for analyzing the dependencies between model objects.
• Stub Generation
  Generating Publisher API stubs in PowerDesigner can accelerate feed handler development.