Chapter 3 Building an XML model
The General page of a unique property sheet displays the following properties:
| Property | Description |
|---|---|
| Name | Name of the unique constraint. It must be a no-colon-name (See Glossary) |
| Code | Code of the unique constraint. It must be a no-colon-name |
| Comment | Descriptive label of the unique constraint |
| Stereotype | Sub-classification used to extend the semantics of an object without changing its structure. It can be predefined or user-defined |
| ID | ID of the unique constraint. Its value must be of type ID and unique within the model containing the unique constraint |
| Selector (XPath) | An XML Path Language expression that selects a set of elements across which the values specified in the Fields page must be unique. There must be one and only one selector |
For more information on Selector or XPath, see section Defining an identity constraint selector.
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