E4X support makes YQL is a great XML-generation engine. Here’s some code to create the response xml for a WebDAV PROPFIND request for a directory called webdav containing an empty file called foo.txt.

Note: to initially get a handle on what XML WebDAV outputs, I turned on WebDAV support in apache and made a curl request to it like this:
curl -X PROPFIND –header “Depth:1” {user}:{pass}@{your ip address}/webdav/

You can run the code below in the YQL console.

<?xml version="1.0" encoding="UTF-8"?>
<table xmlns="http://query.yahooapis.com/v1/schema/table.xsd">
    <meta>
        <author>Erik Eldridge</author>
        <description>
        </description>
        <sampleQuery></sampleQuery>
    </meta>
    <bindings>
        <select produces="XML">
            <inputs>
                <key id="method" type="xs:string" paramType="variable"/>
                <key id="path" type="xs:string" paramType="variable"/>
            </inputs>
            <execute><![CDATA[
                response.object = function () {
                    var xml = <D:multistatus xmlns:D="DAV:">
                        <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">
                           <D:href>/webdav/</D:href>
                           <D:propstat>
                              <D:prop>
                                 <lp1:resourcetype>
                                    <D:collection/>
                                 </lp1:resourcetype>
                                 <lp1:creationdate>2010-01-02T19:43:01Z</lp1:creationdate>
                                 <lp1:getlastmodified>Sat, 02 Jan 2010 19:43:01 GMT</lp1:getlastmodified>
                                 <lp1:getetag>"19013d-1000-b2283b40"</lp1:getetag>
                                 <D:supportedlock>
                                    <D:lockentry>
                                       <D:lockscope>
                                          <D:exclusive/>
                                       </D:lockscope>
                                       <D:locktype>
                                          <D:write/>
                                       </D:locktype>
                                    </D:lockentry>
                                    <D:lockentry>
                                       <D:lockscope>
                                          <D:shared/>
                                       </D:lockscope>
                                       <D:locktype>
                                          <D:write/>
                                       </D:locktype>
                                    </D:lockentry>
                                 </D:supportedlock>
                                 <D:lockdiscovery/>
                                 <D:getcontenttype>httpd/unix-directory</D:getcontenttype>
                              </D:prop>
                              <D:status>HTTP/1.1 200 OK</D:status>
                           </D:propstat>
                        </D:response>
                        <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">
                           <D:href>/webdav/foo.txt</D:href>
                           <D:propstat>
                              <D:prop>
                                 <lp1:resourcetype/>
                                 <lp1:creationdate>2010-01-02T19:43:01Z</lp1:creationdate>
                                 <lp1:getcontentlength>0</lp1:getcontentlength>
                                 <lp1:getlastmodified>Sat, 02 Jan 2010 19:43:01 GMT</lp1:getlastmodified>
                                 <lp1:getetag>"19013f-0-b2283b40"</lp1:getetag>
                                 <lp2:executable>F</lp2:executable>
                                 <D:supportedlock>
                                    <D:lockentry>
                                       <D:lockscope>
                                          <D:exclusive/>
                                       </D:lockscope>
                                       <D:locktype>
                                          <D:write/>
                                       </D:locktype>
                                    </D:lockentry>
                                    <D:lockentry>
                                       <D:lockscope>
                                          <D:shared/>
                                       </D:lockscope>
                                       <D:locktype>
                                          <D:write/>
                                       </D:locktype>
                                    </D:lockentry>
                                 </D:supportedlock>
                                 <D:lockdiscovery/>
                                 <D:getcontenttype>text/plain</D:getcontenttype>
                              </D:prop>
                              <D:status>HTTP/1.1 200 OK</D:status>
                           </D:propstat>
                        </D:response>
                    </D:multistatus>;
                    return xml;
                }();
            ]]></execute>
        </select>
    </bindings>
</table>