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Chapter 2 Building an XML model
XSM User's Guide 77
♦ In the generated XSD file, the group is first declared with the <group>
tag and then reused through a reference (ref) set to descriptionLines:
♦ In the generated DTD file, the group is expanded directly within its
parent element:
♦ In the generated XDR file, the group is declared through a <group> tag,
within an <ElementType> tag with its order attribute set to seq:
Defining group properties
There are global and referencing groups:
♦ Global groups are directly created in a diagram without a parent symbol.
In a schema, they are directly linked to the <schema> tag (root element).
They can be reused within any element or complex type of the model
through references (See descriptionLines in Defining a group of
elements)