TEST :Identity-constraint Definition Schema Component : selector element, content of key
http://www.w3.org/TR/2004/REC-xmlschema-1-20041028/#cIdentity-constraint_Definitions
| Item | Value | 
|---|---|
| title | idD028 - idD028 | 
| name | idD028 | 
| source | ../idD028.xsd | 
| schemaName | ../idD028.xsd | 
| keywords | schema negative | 
| package | javasoft.sqe.tests.identityconstraint.idd028 |