Changelog:

 v2
 * ETA WITH TONOS is now transliterated as I/i to be consistent throughout the table. Ancient Greek calls for E/e and modern for I/i which we are taking here. 


Thanks Florian for the feedback on this!
Egor

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Wednesday, September 4, 2019 9:31 AM, Diego (Egor) Kobylkin <egor@kobylkin.com> wrote:

> Dear locale maintainers,
> 

> fix the glibc bug 12031 "iconv -t ascii//translit with Greek characters" [1]
> add Greek transliteration rows to locale/C-translit.h.in.
> 

> This work is done on the heels of the successfully committed patch for the
> virtually the same bug [BZ #2872] but concerning Cyrillic characters. [2]
> 

> AFAIK there are many versions of transcription tables for Greek to ASCII
> transcription. Given that current iconv logic can only translit one to many
> but not many to many symbols we take the "Standard" part of
> the Romanization_of_Greek#Modern_Greek table [3]
> 

> and only keep the one letter Greek graphems. That "standard" seems to be close to
> the ELOT 743 indeed but not the same.
> 

> So we omit things like M and Μπ being transliterated as M and B accordingly.
> Rather Μπ will be treated like two separate graphems and transliterated as Mp.
> 

> Here is the list of some standards I have collected so far. There doesn't seem
> a way to harmonize them all into one. But if anyone want to propose a solution -
> please do.
> 

> -   ΕΛΟΤ 743 https://www.teicrete.gr/users/kutrulis/Ergalia/ELOT743.htm Passports.
> -   ISO 843 https://en.wikipedia.org/wiki/ISO_843
> -   ALA-LC https://www.loc.gov/catdir/cpso/romanization/greek.pdf Book titles.
> -   BGN/PCGN http://libraries.ucsd.edu/bib/fed/USBGN_romanization.pdf
> -   http://geonames.nga.mil/gns/html/Romanization/Romanization_Greek.pdf Geographical names.
>     

>     Furthermore to cover the whole U0370-U03FF Greek/Coptic Unicode range I have
>     asked around and made a best effort transliteration for the rest of characters
>     not covered in above standards.
>     

>     Should you have better sources for the actual translit entries please make sure to
>     send your feedback!
>     

>     The patch is attached.
>     

>     Best regards,
>     Egor Kobylkin
>     

>     https://sourceware.org/bugzilla/show_bug.cgi?id=12031 [1]
>     https://sourceware.org/ml/libc-alpha/2019-07/msg00477.html [2]
>     https://en.wikipedia.org/wiki/Romanization_of_Greek#Modern_Greek [3]
>