comment's creator by OSLC v2

I am using OSLC v2 for add comment with XML.
also included "dcterms:creator" tag in XML.
But created workitem's comment is not tag user.
Is this bug?
<?xml version="1.0" encoding="utf-8"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:oslc="http://open-services.net/ns/core#">
<rdf:Description rdf:about="https://xxxxxxxx/ccm/oslc/workitems/76/rtc_cm:comments/oslc:comment/0">
<rdf:type rdf:resource="http://open-services.net/ns/core#Comment" />
<oslc:discussion rdf:resource="https://xxxxxxxx/ccm/oslc/workitems/76/rtc_cm:comments" />
<dcterms:identifier>_D56ekJtiEeKDNq5kh3WS2Q</dcterms:identifier>
<dcterms:description rdf:parseType="Literal">note</dcterms:description>
<dcterms:creator rdf:resource="https://xxxxxxxx/jts/users/user@demo.co.jp" />
<dcterms:created rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2013-04-02T06:53:44.558Z</dcterms:created>
</rdf:Description>
</rdf:RDF>
One answer

Hello,
dcterms:creator is the creator of the work item
rtc_cm:modifiedBy: The user who last modified the work item
References:
For OSLC adding comments - https://jazz.net/wiki/bin/view/Main/WorkItemAPIsForOSLCCM20#Adding_comments
Hope it helps.
Eric
Comments
Don Yang
Apr 15 '13, 1:44 a.m.when I commented in a workitem and check with the xml source, I won't see the tag of the user is dcterms:creator, instead, it is:
Maybe you want to try with rtc_cm:modifiedByand see if that works for you or not.