diacanvas-sharp/sources/diacanvas-sharp-sources.xml

<gapi-parser-input>
  <api filename="../dia/diacanvas-api.raw">
    <library name="diacanvas2">
      <namespace name="Dia">
        <dir>diacanvas2-0.14.2/diacanvas</dir>
      </namespace>
    </library>
  </api>
</gapi-parser-input>