When you deploy or compile a customized application at the core application, vertical application, or customer level, warning messages describing unexpected ID attributes are displayed, as shown in the following example. You can safely ignore these messages. These messages display because the schema definition does not include these simple-type elements, which is expected behavior. These messages do not prevent the customized composite from being successfully deployed.

[scac] warning: in
 /scratch/qizhong/my-jdev/mywork/CompositeTestApp2/Project2/composite.xml(22,32): 
 Schema validation failed for
 /scratch/qizhong/my-jdev/mywork/CompositeTestApp2/Project2/composite.xml<Line 22,
 Column 32>: XML-24535: (Error) Attribute
 'http://www.w3.org/XML/1998/namespace:id' not expected.
    [scac] warning: in
 /scratch/qizhong/my-jdev/mywork/CompositeTestApp2/Project2/composite.xml(23,32): 
 Schema validation failed for
 /scratch/qizhong/my-jdev/mywork/CompositeTestApp2/Project2/composite.xml<Line 23,
 Column 32>: XML-24535: (Error) Attribute
 'http://www.w3.org/XML/1998/namespace:id' not expected.