Re: [CF-metadata] [cf-convention/cf-conventions] implement tickets 298 and 319 (#331)

2021-07-02 Thread JonathanGregory
@JonathanGregory pushed 1 commit.

bd7498d3625a1ee464f375952bfd202f7fbc4371  remove redundant text about the 
standard calendar, clarify the deprecation of year and month units


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Re: [CF-metadata] [cf-convention/cf-conventions] implement tickets 298 and 319 (#331)

2021-07-02 Thread Klaus Zimmermann
@zklaus commented on this pull request.



>  We recommend that the unit **`year`** be used with caution. The Udunits 
> package defines a **`year`** to be exactly 365.242198781 days (the interval 
> between 2 successive passages of the sun through vernal equinox). __It is not 
> a calendar year.__ Udunits includes the following definitions for years: a 
> **`common_year`** is 365 days, a **`leap_year`** is 366 days, a 
> **`Julian_year`** is 365.25 days, and a **`Gregorian_year`** is 365.2425 days.
 

Perhaps this is a good opportunity to update the second `udunits.dat` link in 
the following line 217 as well.

I also wonder if we should be explicit in whether CF follows udunits in the 
definitions of year and month. The way these two paragraphs are written, the 
reader might come away with the impression that we are only warning of 
potential misinterpretation by some other software, whereas my understanding so 
far is that we adopt the udunits definition, albeit begrudgingly. But perhaps 
my understand is wrong or you would prefer to address this in a separate issue?

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[CF-metadata] [cf-convention/cf-conventions] implement tickets 298 and 319 (#331)

2021-07-02 Thread JonathanGregory
See issue #298 and #319 for discussion of these changes.

# Release checklist
- [Y] Authors updated in `cf-conventions.adoc`?
- [Y] Next version in `cf-conventions.adoc` up to date? Versioning inspired by 
[SemVer](https://urldefense.us/v3/__https://semver.org__;!!G2kpM7uM-TzIFchu!lEhHX7Dlzu_DokMmU3XI1HiF2bm-ZCpzGwYBXtBSdi9zNW-2Hrx8TOQCdXFoyCNSJoP_g0Y7trg$
 ).
- [Y] `history.adoc` up to date?
- [Y] Conformance document up-to-date?

# For maintainers
After the merge remember to delete the source branch.
Tags are set at the conclusion of the annual meeting; until then `master` 
always is a draft for the next version.

You can view, comment on, or merge this pull request online at:

  
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-- Commit Summary --

  * implement tickets 298 and 319

-- File Changes --

M cf-conventions.adoc (1)
M ch04.adoc (38)
M ch07.adoc (2)
M conformance.adoc (17)
M history.adoc (4)

-- Patch Links --

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