PCA Modelling, Methods and Technology, June 28th 2012

Time and place

28.06.2012, 2.30PM - 3.30PM (CEST)
GoToMeeting (see the meeting invitation for connection details)
Next meeting: 30.08.2012, 7.30AM - 8.30AM (CEST)


Darius Kanga, Devesh Sachar, Gabriel Lopez, Hilbert Pretorius, Magne Valen-Sendstad, Onno Paap, Pavel Selchukov, Scott Gracie, Shiva Krishnasamy, Victor Agroskin, and Kari Anne Haaland Thorsen (MoM)


  1. Approval of agenda
  2. Approval of MoM from last meeting
  3. Summary of the Workshop in Haarlem (21-22 June)
  4. Update on changes on the 15926.org forum
  5. A.O.B.

Minutes of Meetings

1. Approval of agenda


2. Approval of MoM from last meeting


3/4. Summary of workshop in Haarlem and changes on 15926.org

Plant lifecycle data modeling:
The existing discussion on the Plant lifecycle data model (http://15926.org/viewtopic.php?f=3&t=17) is to be replaced. The Plant Lifecycle Data model that is presented her (http://www.15926.org/publications/general-discussions/plant-lifecycle-model/index.htm) gives the overall picture, but might be difficult for people to work on/with. It gives the whole and overall picture on all levels. Most people only tend to work on one level (at the time) when mapping, and this model might then be too much. The model will be replaced by a scheme similar to this: http://www.infowebml.ws/mapping-methodology/index.htm. This gives a methodology for deciding upon patterns. The methodology will be based on the one that is developed as part of the JORD project.
This methodology should, in general, guide you to the correct modelling pattern to use in 80% of the cases. In general there will always be approximately 20% of the modelling issues that cannot be described by the general rules, and these will demand for a modelling specialist, who in turn can consult a modelling guru, to solve.

Temporal Part:
The pattern selector as discussed in the previous section (Plant lifecycle data modelling) will tell you when and how to use temporal parts.

Class life cycle model:
A topic on class life cycle model is to be created on 15926.org. This should be based on the JORD document describing the 4-level architecture. When in a design face modelling is generally done on class level. As projects progress we will always see the need to “change” the classes in our model. What is actually the case is not that the class change but that it needs to be replaced by a new class. We need to be able to track the history and changes for classes.

Power set:
A topic about power set is to be created on 15926.org

Standardized symbols and diagram:
A topic about symbols and diagrams is to be created on 15926.org. This should in general spell out:

  • Symbols to use
  • Format
  • How to do diagram

Subscription to the 15926.org
It is possible to subscribe to the 15926.org forum. We recommend, at least all member of the MMT Core group, to sign up for subscription. In general you need to subscribe to each individual forum. If you would like one single subscription to cover the site as a whole you should contact Onno, and he will arrange this for you.

5. A.O.B.
Victor raised a question about template specifications. A template specification list is available from the 15926.org site. All members of the MMT SIG are authorized to do changes on these templates. We trust the members of the group to be “sober” about making changes. The site track all changes, thus it is possible to roll back there for some reason has been done mistakes.

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