Alignment API: Upgrading from version 3.0 to 3.1

# Change of format in version 3.1

The version 3.1 of the Alignment API has slightly changed the RDF/XML format for alignments so that it contains more information. This should, however, be fully backward compatibe with previous implementations.

The change lies in the `onto1` and `onto2` attributes which now contain structured elements instead of strings. Moreover, the `uri1` and `uri2` element are not strictly necessary (but we still generate them in the renderer.

The old version was presented this way:

    <onto1>http://example.org/the/place/where/to/find/ontology</onto1>
    <uri1>http://example.org/the/ontology/identifier</uri1>

The new version is:

    <onto1>
      <Ontology rdf:about="http://example.org/the/ontology/identifier">
        <location>http://example.org/the/place/where/to/find/ontology</location>
        <formalism>
          <Formalism name="myLanguage" id="http://example.org/my/Language/identifier"/>
        </formalism>
      </Ontology>
    </onto1>

## Report to us

Please report any tweak that we did not mention here so that we can update this document.