Segment Layout Types

Enterprise Developer supports two segment layout types:
You can define one default segment layout for each IMS segment; however it is not mandatory. A default segment layout formats data that does not meet the conditions specified by any conditional segment layouts you have created for that segment type.
You can define one or more conditional segment layouts for each IMS segment. When you create a conditional segment layout, you define a test that applies to one or more fields. To use a conditional segment layout, the data in a segment occurrence must satisfy all the tests defined for that layout.
  • When you initialize a segment occurrence you can choose to specify a segment layout for entering data.
  • When you modify data, the IMS Database Editor works out automatically which layouts to use for which occurrences.