Legacy Issue Number: 19424
Source: General Electric ( Mark Linehan)
Clause 16.4 has a pair of verb concepts: “situation kind has first/last occurrence. Distinguishing between uses of these verb concepts is impossible, since they have the same verb symbol and role types. For example, does a rule that refers to “the time interval of the launching of the SpaceX Dragon” mean the first occurrence of the launching or the last occurrence?
Suggestion: make the keywords “first” and “last” part of the verb symbols rather than the role names.
Reported: DTV 1.0 — Tue, 20 May 2014 04:00 GMT
Disposition: Closed; No Change — DTV 1.2
The example “the time interval of the launching of the SpaceX Dragon” does not use the verb concept wording ‘situation kind has first/last occurrence’ at all. The normal use will be in the noun form: “the first/last occurrence of launching the SpaceX Dragon”, and there is no ambiguity.
Technically, the words ‘first occurrence’ and ‘last occurrence’ are part of the verb symbols. In the SBVR notation, the role ‘first occurrence’ is shown as a noun concept, but it is not a placeholder the role term will appear verbatim in every use of the verb concept wording (in either form). The SBVR notation is confusing, but there is no ambiguity in the usage, just as there is no ambiguity between ‘set has cardinality’ and ‘set has element’. This is an SBVR notation issue, not a DTV issue.
Disposition: Closed, No Change
Updated: Wed, 8 Jul 2015 11:40 GMT
DTV12 — DTV issue: situation kind has first/last occurrence
- Key: DTV12-109
- OMG Task Force: DateTime Vocabulary (DTV) 1.2 RTF