TEST :Syntax Checking for Attribute Declaration (ID) : attributeGroup with child attributeGroup that reference to a simpleType
http://www.w3.org/TR/2004/REC-xmlschema-1-20041028/#cAttribute_Group_Definitions
| Item | Value | 
|---|---|
| title | attgD013 - attgD013 | 
| name | attgD013 | 
| source | ../attgD013.xsd | 
| schemaName | ../attgD013.xsd | 
| keywords | schema negative | 
| package | javasoft.sqe.tests.attributegroup.attgd013 |