Attribute Group use should has proper ref value to be resolved to its declaration.
http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/#cAttribute_Group_Definitions
TEST ag_name00101m1_n - Attribute group declaration. (invalid schema)
| Item | Value | 
|---|---|
| title | ag_name00101m1_n - Attribute group declaration. (invalid schema) | 
| name | ag_name00101m1_n | 
| source | ../AG_name00101m1_n.xsd | 
| schemaName | ../AG_name00101m1_n.xsd | 
| keywords | schema negative | 
| package | javasoft.sqe.tests.agroupdef.ag_name.ag_name00101m.ag_name00101m1_n |