<providesextension>propro</providesextension>
</package>
</required>
<optional>
<extension><name>hash</name></extension>
<extension><name>iconv</name></extension>
<providesextension>propro</providesextension>
</package>
</required>
<optional>
<extension><name>hash</name></extension>
<extension><name>iconv</name></extension>