Data Model

PowerDesigner includes a logical data model for ESP schema and two physical data models for the Sybase IQ and ASE databases.

The indexes for both physical data models are database-specific and must be defined individually. You can open, view, modify, and extend the data models using PowerDesigner.

• ESP Schema Logical Data Model
  The ESP Schema model represents market data in a logical data model independent of any data store.
• Finding an Object in a Diagram
  Locate any object with a symbol in a diagram or among several diagrams. Objects without graphical symbols, such as domains, are not shown in diagrams.
• Data Model Tables
  A list of all data model tables in the Market Data diagrams with their code names and descriptions.
• 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.