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  1. OMG Issue

SYSML14 — Signal flow property description (§

  • Key: SYSML14-40
  • Legacy Issue Number: 18908
  • Status: closed  
  • Source: Airbus Group ( Mr. Yves Bernard)
  • Summary:

    description of Signal flow property has the sentence: “ […] imply sending and/or receiving of a signal usage”. It seems that the word “usage” is not convenient here and is confusing. It should be removed.

  • Reported: SysML 1.3 — Thu, 12 Sep 2013 04:00 GMT
  • Disposition: Resolved — SysML 1.4
  • Disposition Summary:

    Subclause, Description subsection, third paragraph, relates flow properties
    typed by signals to sending signals as follows:
    Flow properties of type Signal imply sending and/or receiving of a signal
    usage. [snip] An “out” FlowProperty of type Signal means that the owning
    Block may send the signal via connectors and an “in” FlowProperty means
    that the owning block is able to receive the Signal.
    The text above does not require implementations to do anything special for flow
    properties typed by signals beyond what is normally done for flow properties,
    because it says “may”. Removing the text would not prevent implementations from
    adding semantics as the text describes, because the specification would not disallow
    it. However, the text implies alternative conforming implementations that should be
    called out, but with more specific language referring to signal events. The revised text
    should not require or prevent signals from being sent due to flow properties, because
    this would invalid existing implementations unnecessarily.

  • Updated: Fri, 6 Mar 2015 20:58 GMT