returns xml fragment.
<response success="true" error="">
if success attribute is "true", the document versions has been returned successfully like the sample below.
if success attribute is "false", the error attribute indicates the encountered error.
<response success="true" error="">
<Versions>
<Version Number="1000001">
<VersionAuthor>System Administrator</VersionAuthor>
<VersionAuthorId>4</VersionAuthorId>
<VersionSize>62653</VersionSize>
<CheckSum>26E3166B</CheckSum>
<DateCreated>2014-04-07 12:25:42</DateCreated>
<DatePublished>2014-04-07 12:27:14</DatePublished>
<Comment>Revised fonts</Comment>
</Version>
<Version Number="1000000">
<VersionAuthor>System Administrator</VersionAuthor>
<VersionAuthorId>4</VersionAuthorId>
<VersionSize>62655</VersionSize>
<CheckSum>26E4163B</CheckSum>
<DateCreated>2014-04-05 11:00:00</DateCreated>
<DatePublished>2014-04-05 11:00:00</DatePublished>
<Comment>Included the last quarter figures</Comment>
</Version>
</Versions>
</response>