title: Debug KML: Namespace prefix xsi for schemaLocation on Document is not defined
body: <p>I would like to submit the KML file generated by ArcGIS 10.1 and GoogleEarthPRO (GE) as supplementary data for my paper in Elsevier.</p>
  
  <p>However, the reviewer wrote me back: <em>"here is an error in the prefix "xsi" for attribute "xsi:schemaLocation”</em>. </p>
  
  <p>When I tried the simple validation of KML file by adding .xml extension and dropping to Chrome (following: <a href="http://kml4earth.appspot.com/kmlBestPractice.html" rel="nofollow noreferrer">http://kml4earth.appspot.com/kmlBestPractice.html</a>) , I've got an error:</p>
  
  <pre><code>error on line 3 at column 217: Namespace prefix xsi for schemaLocation
  on Document is not defined
  </code></pre>
  
  <p>I generated the KML by ArcGIS 10.1 (shp to KML, tool: Layer To KML), which produced the zipped .kmz file. I opened the .kmz file in GoogleEarthPRO and again saved my place as .kml file. Apparenly, the .kml file works well as I can open the file in GE and share it between PC.</p>
  
  <p><a href="https://i.stack.imgur.com/ELsdO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ELsdO.png" alt="enter image description here"></a></p>
  
  <p>I also tried the KMLvalidator here: <a href="http://www.kmlvalidator.org/validate.htm" rel="nofollow noreferrer">http://www.kmlvalidator.org/validate.htm</a> with error: </p>
  
  <pre><code>File upload request was rejected. (/data/tomcat/base-kml-validator/temp/upload_2a88fa18_1591832a38f__7fff_00001631.tmp (No such file or directory)).
  </code></pre>
  
  <p>I don't understand why my .kml file seems to work fine in GoogleEarthPRO on multiple PCs, but it apparently contains the error in <code>xsi for schemaLocation</code>? 
  <strong>The most important, what is the easiest way to fix it?</strong></p>
  
  <p>I am not familiar with scripting the KML code, I am just a beginner and user of GE. Please, how can easily fix my schemaLocation? </p>
  
  <p>File to download: <a href="https://www.dropbox.com/s/azmc6m1ksvtau7o/high_tatra_mts.kml?dl=0" rel="nofollow noreferrer">https://www.dropbox.com/s/azmc6m1ksvtau7o/high_tatra_mts.kml?dl=0</a></p>
  
  <p>Thank you !</p>