The accepted format is:

<map>
  <targetmodule>
  <targetname>ProductDetail</targetname>
  </targetmodule>
  *
  <fields>
     <field>
          <fieldname>productvin</fieldname>
          <fieldID></fieldID>
          <value>productvin</value>
          <predefined></predefined>
          <Orgfields>
              <Relfield>
                  <RelfieldName>cf_880</RelfieldName>
                  <RelModule>Products</RelModule>
                  <linkfield>productvin</linkfield>
              </Relfield>
          </Orgfields>
      </field>
      .............
  </fields>
 <matches>
      <match>
          <fieldname>productdetailname</fieldname>
          <fieldID> </fieldID>
          <value>productdetailname</value>
          <predefined></predefined>
      </match>
      ....................
  </matches>
  <options>
  <update>;FIRST/LAST/ALL
</update>
  </options>
  </map>

This type of map is a developer tool. It permits you to define the relation of fields between two system in order to import and sync the information.