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[[File:Process-Data Diagram 01.jpg|thumb|360px|right|The process data diagram]]
A '''process-data diagram (PDD)''' is a [[diagram]] that describes [[process (computing)|process]]es and [[data]] that act as output of these processes. On the left side the [[meta-process model]] can be viewed and on the right side the [[metadata modeling|meta-data model]] can be viewed.<ref name="WSVB">I. Van de Weerd, J. Souer, J. Versendaal and [[Sjaak Brinkkemper]] (2005). ''Situational Requirements Engineering of Web Content Management Implementations''. SREP2005.</ref>
A process-data diagram can be seen as combination of a [[business process model]] and [[data model]].
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