chaaklau
commented
4 years ago royin-tha-Thai-Latn-1939-generic has been partially implemented by interscript/interscript-ruby#262 along with other royin maps.
(Hyphenation has not yet been implemented.)
royin-tha-thai-latn-1939-precise marks all orthographical distinction and phonemic distinction in one system, which needs to be implemented separately.
Also see comments below.
royin-tha-Thai-Latn-1999 has been partially implemented by interscript/interscript-ruby#262
This map (as well as all other royin maps) is implemented via two extra intermediate steps. (The mapping file of royin-tha-Thai-Latn-1999 only contains rules for Step 3.)
- Thai is first converted into syllable-segmented phonemic Thai;
- Phonemic Thai is converted into IPA;
- IPA is converted into Latn, according to the specification.
The latter two conversion steps can be implemented with rule-based transformation, and accurate conversion should be possible.
The first conversion step (Thai to Phonemic Thai) is a known difficult problem for Thai, and this is independent of transcription systems.
Further testing using geonames-transliteration-data can be done after improvement work for this step.
Originally posted by @chaaklau in https://github.com/interscript/interscript/issues/168#issuecomment-609061617
This issue is to implement the transliteration system of
royin-tha-thai-latn-1939.There are two systems and different IDs should be assigned to them:
royin-tha-thai-latn-1939-genericroyin-tha-thai-latn-1939-preciseSpec: http://www.siamese-heritage.org/jsspdf/1941/JSS_033_1d_RoyalInstituteTranscriptionOfThaiIntoRomanCharacters.pdf
More details: http://www.royin.go.th/wp-content/uploads/royin-ebook/276/FileUpload/758_6484.pdf