XSD SchemaLesson 86Free preview

XSD Attributes

This lesson is part of XML · All levels

Summary

<xs:attribute> is used to declare the attribute of an element with the same data type as a simple element. The attribute is stated in <xs:complexType> and is inherently optional, so use use="required" if it is required. Just like elements, attributes also support default and fixed values.

Key points

Attributes declared in <xs:complexType> belong to related elements
Use="required" makes the attribute mandatory, use="prohibited" prohibits it
Without the use attribute, the value is optional.
Attributes can only appear once so there is no maxOccurs.
Default and fixed also apply to attributes

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