1<schema xmlns="http://www.ascc.net/xml/schematron" >
2     <pattern name="Predefined values">
3          <rule context="AAA">
4               <report test="normalize-space(.) = 'aaa' or normalize-space(.) = 'bbb'">O.K.</report>
5               <assert test="normalize-space(.) = 'aaa' or normalize-space(.) = 'bbb'">The AAA value is not permitted.</assert>
6          </rule>
7     </pattern>
8</schema>
9