Wanjun Huang Uwe Roth Christoph Meinel A Flexible Middleware Platform with Piped Workflow. 950-959 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2889&spage=950 2003 conf/otm/2003 OTM Workshops db/conf/otm/otm2003.html#HuangRM03