Sybase PowerDesigner XML User Manual page 60

Defining elements
Attribute general properties
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There are global and local attributes:
Global attributes are defined with the Model menu. In a schema, they are
directly linked to the <schema> tag (root element). They can be reused
for any element in the model through references (See "NUMBER"
attribute in the generated schema)
Local attributes only apply to the elements in which they are created.
They can be defined by reference to a global attribute (See Reference
property)
Global and local attributes in XDR files
In a model targeted with the XML-Data Reduced language, local attributes
are first declared separately, like global attributes (with the
<AttributeType> tag and a name attribute), then within their parent
element (with the <attribute> tag and a type attribute).
Extract of an XDR file:
You can derive an attribute data type to extend or restrict its values. (Only
with a model targeted with XSD)
To display an attribute property sheet, double-click its name or its icon in the
Browser tree view.
The General page of an attribute property sheet displays the following
properties:
Property Description
Name The name of the item which should be clear and meaningful,
and should convey the item's purpose to non-technical users
Code The technical name of the item used for generating code or
scripts, which may be abbreviated, and should not generally
include spaces
Comment Descriptive label of the attribute
Stereotype Sub-classification used to extend the semantics of an object
without changing its structure. It can be predefined or user-
defined
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