title: Can using the Documents List API cause files to appear on the change list?
body: <p>My application is currently using the Document List API to track file and metadata changes using the Changelist.  When we find a file has changed, we grab the metadata, the acl information, and the actual file.  Lately we've found that we are getting a number a percentage of files that continually show up in the changelist every time we check.</p>
  
  <p>After a bit of investigating, there is very little metadata that is changing in the file.
  Here are examples from two different files that continually show up in the changelists.</p>
  
  <p>Is there anyway I can avoid seeing these files over and over again?  I have partially optimized to not download the files again, but it is still taking extra quite a bit of overhead to weed out false-positives from the changelist.  Does anyone know if updating my app to use the Drive API will fix this issue?</p>
  
  <p>Here is an example of what I'm seeing:</p>
  
  <p>File 1 - Through the Documents List API
  Initial Info</p>
  
  <blockquote>
    <p>entry:etag=\"&quot;CkcaSU1LASt7ImBk&quot;\"</p>
    
    <p>id:...feeds/id/spreadsheet%3A0AgVqS9FfzZOCdGhZSVZ4UEtyT2tmRnZsR3lGNFBrVWc</p>
  
  <pre><code> published:2010-12-13T01:58:22.467Z
  
   updated:2010-12-13T02:03:22.269Z
  </code></pre>
    
    <p>...</p>
    
    <p>link:rel=\"thumbnail\" type=\"image/jpeg\" href=...?id=0AgVqS9FfzZOCdGhZSVZ4UEtyT2tmRnZsR3lGNFBrVWc&amp;v=1&amp;s=AMedNnoAAAAAUQHGlnP_b5jppjlFLN9OHRY5VSP2KZNR&amp;sz=s220\"</p>
    
    <p>...</p>
    
    <p>/entry</p>
  </blockquote>
  
  <p>Next Time I looked at the changelist</p>
  
  <blockquote>
    <p>entry etag=\"&quot;CkUFR0sIQyt7ImBk&quot;\"
          id:...feeds/id/spreadsheet%3A0AgVqS9FfzZOCdGhZSVZ4UEtyT2tmRnZsR3lGNFBrVWc</p>
  
  <pre><code> published:2010-12-13T01:58:22.467Z
  
   updated:2010-12-13T02:03:22.269Z
  </code></pre>
    
    <p>...
       link:rel=\"thumbnail\" type=\"image/jpeg\" href=\"...?id=0AgVqS9FfzZOCdGhZSVZ4UEtyT2tmRnZsR3lGNFBrVWc&amp;v=1&amp;s=AMedNnoAAAAAUQMH4STQC7QSN1CJivPIl0U5KvMD8eKe&amp;sz=s220\"</p>
    
    <p>...</p>
    
    <p>/entry</p>
  </blockquote>
  
  <p>The only differences are the etag, updated time, and thumbnail image.  The file itself did not change at all.</p>
  
  <p>File 2 - This info I grabbed using the APIs explorer (using the DriveAPI 2 changes.get)</p>
  
  <blockquote>
    <p>{</p>
  
  <pre><code> "kind": "drive#change",
  
  "id": "21012",
  
   "fileId": "0AgVqS9FfzZOCdGQyQUNjWkF0alVpNGd0WXNLMnpNU2c",
  </code></pre>
    
    <p>...</p>
  
  <pre><code> "thumbnailLink": ".../feeds/vt?gd=true&amp;id=0AgVqS9FfzZOCdGQyQUNjWkF0alVpNGd0WXNLMnpNU2c&amp;v=1&amp;s=AMedNnoAAAAAUQlhSo3rF73K5WnN7E0qSR0uMhWEqM-t&amp;sz=s220",
  </code></pre>
    
    <p>...</p>
    
    <p>}</p>
  </blockquote>
  
  <p>Ran through grabbing changes from the Documents List API, then checked the changelist again.</p>
  
  <blockquote>
    <p>{</p>
  
  <pre><code>"kind": "drive#change",
  
  "id": "21013",
  
  "fileId": "0AgVqS9FfzZOCdGQyQUNjWkF0alVpNGd0WXNLMnpNU2c",
  </code></pre>
    
    <p>...</p>
  
  <pre><code> "thumbnailLink": ".../feeds/vt?gd=true&amp;id=0AgVqS9FfzZOCdGQyQUNjWkF0alVpNGd0WXNLMnpNU2c&amp;v=1&amp;s=AMedNnoAAAAAUQlh69m8ZG_MzNujmmu80HN9XJ2jpG61&amp;sz=s220",
  </code></pre>
    
    <p>...</p>
    
    <p>}</p>
  </blockquote>
  
  <p>In this case, the thumbnail link had again changed, and there was no longer a change with id 21012.</p>