DATETIME VOCABULARY FTF DISPOSITION RESOLVED OMG ISSUE NO 16665

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OMG Issue Number:

Date-Time Vocabulary FTF

Disposition: Resolved

OMG Issue No: 16665

Disposition: Resolved

OMG Issue No: 16665

Title: Granularity Appears Twice

Source:

Donald Chapin – Business Semantics Ltd - [email protected]

Summary:

The term "granularity" has two glossary entries, one in clause 8.2, and another in D.4. One should be renamed to avoid confusion, although they mean almost the same thing.

Proposed Resolution:

(The submission team adopted this resolution after the final submission. The change is recorded here as an Issue so that it can be considered by the FTF.)

Under "time scale has granularity" in clause 8.2, add a new Necessity:

The scale of the time scale is the granularity of the time scale if and only if the granularity of the time scale is a precise time unit.

In Annex E.3:

rename the glossary entry "granularity" to "scale granularity"
rename the glossary entry "scale has granularity" to "scale has scale granularity"
reword the Necessity under " scale has scale granularity" to read:

Each scale has at most one scale granularity.

Add 1 note and 2 examples:

Time scales are kinds of scales, but time scales of nominal time units (which are not true measurement units) do not have true scale granularities (which are always measurement units).

The Gregorian years scale has a granularity of 'year'. This granularity is the scale granularity of the scale.
The Gregorian months scale has a granularity of 'month'. This scale does not have a scale granularity because 'month' is a nominal time unit, not a precise time unit.

Resolution:

Rename "granularity" in Annex D to avoid confusion. Add Necessities and examples to clarify the model in the case where a time scale has a nominal time unit.

Revised Text:

Under "time scale has granularity" in clause 9.2 on page 79, add a new Necessity:

The scale of the time scale is the granularity of the time scale if and only if the granularity of the time scale is a precise time unit.

In Annex D.4, on page 215-216:

rename the glossary entry "granularity" to "scale granularity"
rename the glossary entry "scale has granularity" to "scale has scale granularity"
reword the Necessity under "scale has scale granularity" to read:

Each scale has at most one scale granularity.

Add 1 note and 2 examples:

Time scales are kinds of scales, but time scales of nominal time units (which are not true measurement units) do not have true scale granularities (which are always measurement units).

The Gregorian years scale has a granularity of 'year'. This granularity is the scale granularity of the scale.
The Gregorian months scale has a granularity of 'month'. This scale does not have a scale granularity because 'month' is a nominal time unit, not a precise time unit.

Disposition: Error: Reference source not found

DATETIME VOCABULARY FTF DISPOSITION RESOLVED OMG ISSUE NO 16665
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Tags: issue, datetime, 16665, disposition, vocabulary, resolved