TEST :Syntax Checking for Attribute Declaration (ID) : Test attributeGroup declaration with optional attribute id=''
http://www.w3.org/TR/2004/REC-xmlschema-1-20041028/#cAttribute_Group_Definitions
| Item | Value | 
|---|---|
| title | attgA003 - attgA003 | 
| name | attgA003 | 
| source | ../attgA003.xsd | 
| schemaName | ../attgA003.xsd | 
| keywords | schema negative | 
| package | javasoft.sqe.tests.attributegroup.attga003 |