Overpass API developpement

[Jan Marsch <>]

Hello,

TL;DR: When converting Overpass QL to XML Query, results get messed up.

Formerly with direct access to public Overpass, I’ve used this query to get 
all buildings & parts:

[out:json];
(
way["building"]({s},{w},{n},{e});
node(w);
way["building:part"]({s},{w},{n},{e});
node(w);
relation["building"]({s},{w},{n},{e});
way(r);
node(w);
relation["building:part"]({s},{w},{n},{e});
way(r);
node(w);
relation["type"="building"]({s},{w},{n},{e});
way(r);
node(w);
);out;

Now I’m running a local Overpass instance which gets accessed by a custom web 
server.
In order to use osm3s_query, I needed to convert the query to XML with 
http://overpass-turbo.eu/
Result is this:

<osm-script output="json">
  <union into="_">
    <query into="_" type="way">
      <has-kv k="building" modv="" v=""/>
      <bbox-query e="13.41103971004486" into="_" n="52.51946886742985" 
s="52.516710528069794" w="13.406785726547241"/>
    </query>
    <recurse from="_" into="_" type="way-node"/>
    <query into="_" type="way">
      <has-kv k="building:part" modv="" v=""/>
      <bbox-query e="13.41103971004486" into="_" n="52.51946886742985" 
s="52.516710528069794" w="13.406785726547241"/>
    </query>
    <recurse from="_" into="_" type="way-node"/>
    <query into="_" type="relation">
      <has-kv k="building" modv="" v=""/>
      <bbox-query e="13.41103971004486" into="_" n="52.51946886742985" 
s="52.516710528069794" w="13.406785726547241"/>
    </query>
    <recurse from="_" into="_" type="relation-way"/>
    <recurse from="_" into="_" type="way-node"/>
    <query into="_" type="relation">
      <has-kv k="building:part" modv="" v=""/>
      <bbox-query e="13.41103971004486" into="_" n="52.51946886742985" 
s="52.516710528069794" w="13.406785726547241"/>
    </query>
    <recurse from="_" into="_" type="relation-way"/>
    <recurse from="_" into="_" type="way-node"/>
    <query into="_" type="relation">
      <has-kv k="type" modv="" v="building"/>
      <bbox-query e="13.41103971004486" into="_" n="52.51946886742985" 
s="52.516710528069794" w="13.406785726547241"/>
    </query>
    <recurse from="_" into="_" type="relation-way"/>
    <recurse from="_" into="_" type="way-node"/>
  </union>
  <print e="" from="_" geometry="skeleton" limit="" mode="body" n="" 
order="id" s="" w=""/>
</osm-script>

When executing this now, it misses a lot of building parts and ssemingly 
properties as well.

I’m very unsure, whether the syntax is correct and whether union and 
recursions work properly.

1. Can I probably use the Overpass QL withiut havin Apache in place?
2. Could you review my XML query, regarding the intended query above?

Thank you very much
Jan