Right-click the dsetype.xml, and select Validate.
The BTT Validation Tool validates the file against its XSD schema and finds
out that the implClass_error is not allowed to appear in
the element <Type>. The BTT Validation Tool reports this
error and marks the location of the error and the error text.
In the Problems view, the error is also displayed. You can double-click
the error, and then the error in the XML file is highlighted.