Name
xsi:type
The xsi:type attribute
lets you define the type of an element locally (in the document)
rather than in the schema. As XML Schema Part 1: Structures puts
it, “An element information item in an instance may, however,
explicitly assert its type using the attribute xsi:type.”
The value of the xsi:type
attribute must be a QName, identifying the type of the element.
The type specified by xsi:type
has to be a subtype of the type that was declared for the element
originally. For the xsi:type
declaration to work, a matching type must be defined in the schema
the validator is using. Most typically, the xsi:type attribute is used to specify
predefined types, but it isn’t limited to that.
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