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6. 2019 OIMT Minutes
7. 2019-07-18 OIMT Meeting notes

Page History

• Face-to-Face Meetings
  • 2019 September 9-13 ONF OIMT & OTCC Silicon Valley Meeting
    • Nigel plans to update the new repository next week
    • It was agree to find some way of distributing the meal costs between the attendees
• ITU-T liaison

  • Will be discussed next week (see Liaisons (ITU-T SG15 (July 12, 2019)))

• There was no feedback on the Action items and work items

MEF and ONF differ in the use of decorator (GoF) v Chris' Decoration approach

• Karthik has prepared some material for work in MEF (which was not discussed in detail as it is a MEF contribution)
• Chris noted that he had prepared material previously but could not find it on the wiki page

•  AI: Nigel Davis Hing-Kam Lam: Are documents getting dropped from the wiki contribution page?

• Chris resubmitted the paper at  ONF Extension by Decoration.docx
• Later in the meeting Chris went through the material briefly

•  AI: Nigel Davis: Review Chris' document against other material on decorator and provide any additional input to Karthik

• {{Form last week }}Nigel/Andrea summarized the essential concern
  
  • An intent can be defined in terms of constraints where those constraints may identify specific entities. If the constraint is intended to be throughout the life of the entity then this puts a lifecycle dependency between the constrained thing and the constraining thing. There appear to be various possible dependencies but the constraint is not explicit as to which one is relevant.
  • It appears that this has not been covered in any known prior work
• Nigel noted that the current intent statements do not allow for full lifecycle dependency constraints
• Chris note that this relates to Malcolm's Lifecycle dependency

•  AI: Nigel Davis: Discuss this challenge off-line with Malcolm

• Nigel noted that
  • The issue occurs when there is a one way relationship to a thing that then gets deleted or changed
  • The issue only arises when there is persistent constraints
  • There should be some defined action for each Lifecycle change
• Andrea noted that in some way relates to slicing
  • There are independent constraints
• Andrea noted that
• Nigel indicated that we simply need to state the legal behaviors
  • A null pointer may be completely valid under some circumstances and not other
• Karthik indicated that Yang require-instance is true/false

•  AI: Karthik Sethuraman: Explore Yang require-instance meaning and usage

• Nigel pointed out that there are some constraints that do not have any obvious reason for their existence
• Karthik noted that Bernd had covered a lot of this in the work on association dependencies related to the lifecycle strereotype.

•  AI: Nigel Davis: Study the guidelines for statements on lifecycle dependency and requires-instance

• We should consider providing a property with the constraints

Deferred

AI: Hing-Kam Lam  Nigel Davis Add "next release of TR-512" to next week's agenda.