Build an XML API signature file from a reference API. Verify another API "implementation" against that signature.
'org.ow2.spec.harness:signature-harness:2.0.0'
<dependency>
<groupId>org.ow2.spec.harness</groupId>
<artifactId>signature-harness</artifactId>
<version>2.0.0</version>
</dependency>
<dependency org="org.ow2.spec.harness" name="signature-harness" rev="2.0.0"/>
"org.ow2.spec.harness", "signature-harness", "2.0.0"