Each object can have one or more collections, which contain objects with which it interacts. For example, a table has collections of columns, indexes, business rules and so on.
Collections are represented in the PowerDesigner metamodel (see Resource Files and the Public Metamodel) by associations between objects, with roles named after the collections.
The available collection members are:
|
Name |
Type |
Description |
|---|---|---|
|
First |
Object |
Returns the first element of the collection |
|
IsEmpty |
Boolean |
Used to test whether a collection is empty or not. True if the collection is empty, false otherwise |
|
Count |
Integer |
Number of elements in the collection |
Note: Count is particularly useful for defining criteria based on collection size, for example (Attributes.Count>=10).