Chapter 3 Building XML Models

Attribute Groups (XSM)

Attribute groups are not supported by XDR.

An attribute group is a set of attributes, which is referenced in the model by various elements:

• An attribute group - is created independently, without a parent element, and can be reused multiple times by elements, complex types or other global attribute groups, through references. In a schema, it is directly linked to the <schema> tag (root element). See Creating an attribute group.
• A reference to an attribute group - is created within an element, complex type, or global attribute group, and makes the referenced attribute group available to its parent. See Creating a reference to an attribute group.

For example:

The quality attribute group is composed of the guarantee and qualityStandards attributes. The productA element reuses the quality attribute group via the Attributes tab of its property sheet.

• Generated XSD file:
  
  
  In a schema, a group of attributes is declared with the <attributeGroup> tag. It can contain the following tags: <attribute>, <attributeGroup> or <anyAttribute>.
• Generated DTD file:
  

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