Overpass-API/some_rules.xml

<?xml version="1.0" encoding="UTF-8"?>
<not-osm>

<osm-script name="Area::Create_from_admin_level" version="1">

<query type="relation">
  <has-kv k="admin_level"/>
  <has-kv k="name"/>
</query>
<foreach into="rel">
  <union>
    <recurse type="relation-way" from="rel"/>
    <recurse type="way-node"/>
  </union>
  <make-area pivot="rel" into="odd"/>
  <detect-odd-nodes into="odd"/>
  <foreach from="odd" into="i">
    <union><item set="i"/><item set="rel"/></union>
    <conflict>In <item set="rel"/>, the <item set="i"/> is contained in an odd number of segments.</conflict>
  </foreach>
</foreach>

</osm-script>

<osm-script name="Area::Create_from_multipolygon" version="2">

<query type="relation">
  <has-kv k="type" v="multipolygon"/>
  <has-kv k="name"/>
</query>
<foreach into="rel">
  <union>
    <recurse type="relation-way" from="rel"/>
    <recurse type="way-node"/>
  </union>
  <make-area pivot="rel" into="odd"/>
  <detect-odd-nodes into="odd"/>
  <foreach from="odd" into="i">
    <union><item set="i"/><item set="rel"/></union>
    <conflict>In <item set="rel"/>, the <item set="i"/> is contained in an odd number of segments.</conflict>
  </foreach>
</foreach>

</osm-script>


</not-osm>