Template talk:ISO 15924 script codes and Unicode

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Geok issue[edit]

Geok = Khutsuri (Asomtavruli and Nuskhuri). More to follow. -DePiep (talk) 21:27, 16 June 2014 (UTC)

ISO 15924 is published on the Unicode site. Unicode adds a "Property Value Alias" (PVA) to script codes, for scripts in Unicode. The PVA is usually a short name for the script (see the template list for differences).
ISO 15924 is published at ISO 15924 Code Lists
1, ISO: There is a link "Table 5. Alphabetical list of four-letter script names (normative plain-text data file)" (filename: iso15924.txt.zip; datafile unzipped is named iso15924-utf8-20131012.txt)
2, PVA: And "The Property Value Alias is defined as part of the Unicode Standard".

The ISO file contains these rows:

Geor;240;Georgian (Mkhedruli);géorgien (mkhédrouli);Georgian;2004-05-29
Geok;241;Khutsuri (Asomtavruli and Nuskhuri);khoutsouri (assomtavrouli et nouskhouri);Georgian;2012-10-16

The pre-last data position is the "PVA" value, being "Georgian" for both.

The PVA file says:

# Script (sc)
sc ; Ethi                             ; Ethiopic
sc ; Geor                             ; Georgian
sc ; Glag                             ; Glagolitic

(so, no Geok script data present)
This appears to be a contradiction. For now, I have added "Geok" (PVA: "Georgian" too) to the (PVA/ISO 15924) Alias list, and so it shows in this template table. -DePiep (talk) 22:09, 16 June 2014 (UTC).

(in reverse, the ISO file is not updated for new PVAs (e.g., Bass has no PVA in there). However, this does not contradict.
I don't get why the normative, defining file is not updated, while its definitions are used in a published version.) -DePiep (talk) 08:36, 17 June 2014 (UTC)
I don't see a problem here. Just because the ISO 15924 Registration Authority is hosted on the Unicode site does not imply that the Unicode Consortium is responsible for ISO 15924 (the actual ISO 15924 standard is not "published on the Unicode site" but on the ISO site), or that there is necessarily a one-to-one relationship between ISO 15924 script codes and Unicode script property value aliases. ISO 15924 recognises two varieties of Georgian script, Geor and Geok, but the Unicode standard only recognises a single Georgian script with PVA=Geor; therefore there is no "Geok" script code in Unicode, and the Unicode alias column of the template should be left blank. The situation is analogous to that of Latin, Gaelic and Fraktur: ISO 15924 defines Latn, Latg and Latf codes, but Unicode only defines a single Latin script (PVA=Latn). There is no contradiction. BabelStone (talk) 11:13, 17 June 2014 (UTC)
PVA is defined by Unicode, not by ISO 15924. Even in the ISO file. So this way Unicode defines and publishes two different definition lists. That is a contradiction by Unicode. End of story. Whichever Unicode definition list one chooses, it introduces an error. More so in automated applications. -DePiep (talk) 11:56, 17 June 2014 (UTC)