XML: Namespace - Zuweisung funktioniert nicht

[s-off]

Okidoki, hier der Anfang der besagten XML-Datei:

XML-Code:

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.0">
<Document>
   <Folder>
      <name>My Places</name>
       <open>1</open>
       <Folder>
         <name>Ordner1</name>
         <open>1</open>
         <Placemark>
              <name>Placemark1</name>
              <LookAt>
                <longitude>10.37993318693747</longitude>
                <latitude>19.35357660723419</latitude>
                <range>743945.2733547823</range>
                <tilt>-1.858292979523515e-013</tilt>
                <heading>1.206473994247129</heading>
              </LookAt>
              <styleUrl>root://styleMaps#default+nicon=0x307+hicon=0x317</styleUrl>
              <Point>
                <coordinates>10.37993318693747,19.35357660723419,0</coordinates>
              </Point>
         </Placemark>