Attribute Element

Refers to a declared attribute type that can appear within the scope of the named ElementType element.

Syntax

<Attribute
    default="default-value" 
    required="{yes | no}" >

Attributes

default

Default value for the attribute. This specified default takes precedence over any default provided on the AttributeType element it refers to.

required

Indicator of whether the attribute must be present.

Element Information

Number of occurrences	Number of attribute types specified in the schema.
Parent elements	AttributeType, ElementType, group
Child elements	(No child elements)
Requires closing tag	Yes. XML Schema is an XML grammar and, like all XML grammars, all tags must have closing tags to satisfy the definition of well-formed.

Remarks

When the required attribute is set to "yes" and the default attribute specifies a default value, the supplied default value must always be the value, and documents containing other attribute values are invalid.

When the required attribute is set to "yes" and no default is specified, each element whose type is declared to have the attribute must supply its value.

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