The page http://www.geolang.com/iso639-6/ has a field "Language Reference Name (part or whole)", but it does not bring results for "Ottoman" despite that when searching for "Turkish" in the same field one gets results that contain the string "Ottoman" in the field "Language Reference Name".
Same applies when searching for "English" - this brings only two hits. But when searching "engs" in the "Alpha-4 Parent ID (exact)"-field many more entries containing the term "English" are shown.
The "Alpha-4 ID" and "Alpha-4 Parent ID" fields on the website contain also alpha-3 codes (three digit alpha codes).
As of 2012-08-06 the links in the result lists labeled "more details" return a page
Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator to inform of the time the error occurred and of anything you might have done that may have caused the error. More information about this error may be available in the server error log.
One URI that yields this output is http://www.geolang.com/iso639-6/moreDetails.asp?alpha4ID=tur
Scripts identified by language codes
http://www.geolang.com/iso639-6/ searching "Language Reference Name (part or whole)" for Turkish, gives six results:
- Turkish Spoken
- Turkish, Ottoman (1500-1928)
- Turkish, Ottoman (1500-1928) Armenian Script
- Turkish, Ottoman (1500-1928) Hellenic Script
- Turkish, Ottoman (1500-1928) Perso-Arabic Script
If scripts are identified by the language codes, then the codes of ISO 15924 are superfluous for the last three.
- ISO 15924 Codes for the representation of names of scripts