After upgrading to latest eclipse and java ( sdk 8, java ee 7 ), getting "the content of element type ... must match"

After upgrading to the latest eclipse and java ( sdk 8, java ee 7 ), I'm getting : The content of element type "definition-entry" must match "(definition, clarification?, comment?)".

My previous setup didn't object to my xml document. The element in question is :

            <definition-entry>
                <definition>
                    club
                </definition>
                <clarifictation>
                    hit
                </clarifictation>
            </definition-entry>

Any ideas?