TEST :Identity-constraint Definition Schema Component : key element, content of choice
http://www.w3.org/TR/2004/REC-xmlschema-1-20041028/#cIdentity-constraint_Definitions
| Item | Value | 
|---|---|
| title | idB058 - idB058 | 
| name | idB058 | 
| source | ../idB058.xsd | 
| schemaName | ../idB058.xsd | 
| keywords | schema negative | 
| package | javasoft.sqe.tests.identityconstraint.idb058 |