An XML Schema is an XML document:

• Namespace:

  http://www.w3.org/2001/XMLSchema

• Document Element:

  schema

The attribute 'targetNamespace' specifies the namespace that the schema defines.

Example:

<xs:schema xmlns:xs='http://www.w3.org/2001/XMLSchema'
           targetNamespace='urn:publicid:IDN+cde.berkeley.edu:...'>
...
</xs:schema>

NOTE: This slides will always use 'xs' for the prefix of the schema namespace.