TEST :Syntax Checking for Attribute Declaration (ID) : attributeGroup that has two attributeGroups, which reference to two different attributeGroups that reference the same attribute
http://www.w3.org/TR/2004/REC-xmlschema-1-20041028/#cAttribute_Group_Definitions
| Item | Value | 
|---|---|
| title | attgD016 - attgD016 | 
| name | attgD016 | 
| source | ../attgD016.xsd | 
| schemaName | ../attgD016.xsd | 
| keywords | schema negative | 
| package | javasoft.sqe.tests.attributegroup.attgd016 |