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Introduction Edit

Please read following background documents.

Definitions Edit

  • 'ID' represents the systems where format control characters are stripped
  • 'IDN' is a ID system with additional restrictions.
  • 'Text' means sequence of Unicode characters without any filtering or restriction.

Comparison table Edit

Option# Option 1 Option 2 Option 3 Option 4
Proposals: <Consonant, VIRAMA, ZWJ> <Consonant, VIRAMA, special joiner>. This special Joiner ignored in some text processing like IDN and preserved in rest. <Consonant, Chillu Sign> Atomic encoding of Chillus
Current Status Current standard Discussed in the Indic list Rejected Proposed new standard
1. Can represent Chillu of റ (RRA)‍ No No No Yes
2. Has a non-transparent representation of Chillu No for IDN (words with Chillu cannot be registered as IDN) No for IDN (words with Chillu cannot be registered as IDN) Yes Yes
3. Words like നന്മ and നന്‍‌മ that are visually different, but meaning the same, can be encoded the same Yes; barring format control characters (നന്‍‌മ cannot be used in IDN) No in text; Yes in IDN (നന്‍‌മ cannot be used in IDN) No (needs higher level logic to establish the equivalence) No (needs higher level logic to establish the equivalence)
4. If a new chillu letter is discovered, no need to encode it specifically Yes in text; no chillu representation available for IDN or ID Yes in text and ID; no chillu representation available in IDN Yes No
5. ന്റ (/nta/) does not need a non-intuitive character sequence False: <NA, VIRAMA, ZWJ, VIRAMA, RRA> with 2 consecutive VIRAMAs False: <NA, VIRAMA, special joiner, VIRAMA, RRA> Partly True: <NA, chillu-sign, VIRAMA, RRA>. Two consecutive VIRAMAs not required; However, equates ന്റ to ന്‍‌്റ. Partly True: <Chillu-NA, VIRAMA, RRA>. Two consecutive VIRAMAs not required; However, equates ന്റ to ന്‍‌്റ.
6. Chillu-RA/RRA (ര്‍‌) is intuitive to native user No. Native user assumes that ര്‍ is based on RRA No. Native user assumes that ര്‍ is based on RRA No. Native user assumes that ര്‍ is based on RRA Yes. Base character is not relevant at the encoding level

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