search

ucum-org / ucum

https://ucum.org
Other
57 stars 10 forks source link

%O – Promille - thousandth #69

Closed timbrisc closed 3 years ago

timbrisc commented 13 years ago

Issue migrated from trac ticket # 88

component: help | priority: major | resolution: wontfix

2011-07-26 19:20:52: gschadow@pragmaticdata.com created the issue

Claire Marie West (clairemwest) proposed in #69 to add

%O – Promille - thousandth

timbrisc commented 13 years ago

2011-07-26 19:33:45: gschadow@pragmaticdata.com changed status from new to reject_proposed

timbrisc commented 13 years ago

2011-07-26 19:33:45: gschadow@pragmaticdata.com commented

interesting proposal if at all, I would say the o should be lower case "%o". BUT we already have [ppth] - parts per thousand, does it really matter to have a unit symbol for something rather trivial? I will propose rejection, with the invitation of someone else to support the case.

timbrisc commented 3 years ago

2021-01-15 04:13:40: simon.cox@csiro.au set component to help

timbrisc commented 3 years ago

2021-01-15 04:13:40: simon.cox@csiro.au edited the issue description

timbrisc commented 3 years ago

2021-01-15 04:13:40: simon.cox@csiro.au commented

Actually there is a proper symbol for this: ‰ It is sometimes used in geochemistry, particularly for isotopes. It is functionally the same as [ppth] but might be helpful for the symbol to be available somehow. Is it possible for the UCUM schema to support an alternative symbol?

timbrisc commented 3 years ago

2021-01-15 04:14:22: simon.cox@csiro.au commented

Also see https://en.wikipedia.org/wiki/Per_mille

timbrisc commented 3 years ago

2021-01-15 21:01:40: mitchbre@regenstrief.org changed status from reject_proposed to new

timbrisc commented 3 years ago

2021-01-15 21:01:57: mitchbre@regenstrief.org changed status from new to assigned

timbrisc commented 3 years ago

2021-01-15 21:01:57: mitchbre@regenstrief.org set owner to Christof Gessner

timbrisc commented 3 years ago

2021-02-16 17:55:06: gessner@mxdx.de commented

This ticket touches on the question of connecting a "printable representation" to a UCUM (atomic) unit. Which raises a lot of question, including how to display UCUM expressions that are not atomic.

I tend to reject this, claiming this is out of scope for the UCUM code system. I saw a related ticket, addressing the question of µg vs ug.

Note that there is a liaison between ISO/TC 215 and ISO/TC 12 with the goal to establish a connection between UCUM and the ISO 80000 series. The latter addresses the question of "printable symbols", among others.

timbrisc commented 3 years ago

2021-02-17 18:17:48: simon.cox@csiro.au changed status from assigned to closed

timbrisc commented 3 years ago

2021-02-17 18:17:48: simon.cox@csiro.au set resolution to wontfix

timbrisc commented 3 years ago

2021-02-17 18:19:28: simon.cox@csiro.au commented

Apologies for my earlier comment. I was confusing the issue. Yes there is a correct Unicode symbol for promille, but it is not available on a 7-bit ascii keyboard. UCUM codes are explicitly limited to 7-bit ascii keyboards.