SyncDocuments 2100 is a document change notice. The difference between these messages and job type 2000 is that the actionCode attribute value is “Change”.

<SyncDocuments releaseID="1.2.1" versionID="4.0.0" languageCode="EN" xmlns="http://www.mimosa.org/ccom4" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:oa="http://www.openapplications.org/oagis/9">
  <oa:ApplicationArea>
    <oa:Sender>
      <oa:LogicalID>b6bce56c-863f-4d2f-894b-a8f822ef691b</oa:LogicalID>
      <oa:Community>CleanTest</oa:Community>
    </oa:Sender>
    <oa:CreationDateTime>2017-03-10T03:49:51Z</oa:CreationDateTime>
    <oa:BODID>3424bdc9-c8de-4a81-860b-0b9b7bef154c</oa:BODID>
  </oa:ApplicationArea>
  <DataArea>
    <oa:Sync>
      <oa:ActionCriteria>
        <oa:ActionExpression expressionLanguage="XPath" actionCode="Change">
          /SyncDocuments/DataArea/Documents
        </oa:ActionExpression>
      </oa:ActionCriteria>
    </oa:Sync>
    <Documents>
      <Document>
        <UUID>2d598663-7015-4b8e-80bb-c484307f4f8a</UUID>
        <ShortName>528A1E38-6C3C-45C8-BFE6-03BA1E953C5A 2017-03-10 03-43-59</ShortName>
        <Middle></Middle>
        <FullName>528A1E38-6C3C-45C8-BFE6-03BA1E953C5A 2017-03-10 03-43-59</FullName>
        <Description></Description>
        <Revision>A</Revision>
        <DocumentStatus>Changing</DocumentStatus>
        <DateEffective></DateEffective>
        <DateObsolete></DateObsolete>
        <URL>/Search/QuickLink.aspx?n=528A1E38-6C3C-45C8-BFE6-03BA1E953C5A 2017-03-10 03-43-59&amp;t=3&amp;d=&amp;sc=Global&amp;state=LatestRevision&amp;i=view</URL>
        <Type>
          <UUID>
          </UUID>
          <ShortName>BA1DA7D7-17A9-4E0D-B40B-9FD758FB826C 2017-03-10 03-43-59</ShortName>
        </Type>
        <Language>EN</Language>
      </Document>
    </Documents>
  </DataArea>
</SyncDocuments>