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Merlin: Consonant RA Rule R2 doesn't hold true with Lucida font

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    • 2d
    • Fix Understood
    • sparc
    • solaris_7

    Description

      Consonant RA Rule R2 doesn't hold true when the dead consonant precedes any
      independent vowel. (It holds true if the dead consonant precedes any live
      consonant) This is the case regardless which font is used. (reproduce with
      jComboPanelHindiR2_2.java, attached)

      Is this rule not supported?
      =======================================
      Attached here is Doug's comments:

      Min-Chi:

      Eric agrees with you that this is how the rules read, and how it seems
      the text
      should actually render-- though we have to look into it. Neither MS nor
      CDAC (the group in India who created iLeap) do this.

      [Eric's comments follow--

      RA HALANT before an independent vowel renders as a dead RA using
      Uniscribe
      and in iLeap, so I guess that what we're doing is OK. My reading of the
      rule, however, is the same as Min-Chi's - it reads like it should render
      with a REPH on the vowel. I'm suspicious that this is really the right
      thing to do, since the vowel II (U+0908) already has a mark on it that
      looks like a REPH...]

      Doug
      =======================================================

      The font with Hindi glyphs is not integrated in build as of Merlin b43, this is filed so we can keep track of the problem.

      minchi.tien@eng 12-07-00

      -----
      The Unicode committe _still_ hasn't decided what to do about this.

      [Eric forwarded some email between Joe Becker (Xerox) and Jim Agenbroad (Library of Congress) about this issue, which has been kicking around since 1999.]

      Here are Joe's messages. At this point, my inclination is to do nothing and
      hope that the "bad" spelling is depricated, in which case I won't *ever*
      have to do anything...

      Eric

      -----Original Message-----
      From: James E. Agenbroad [mailto:###@###.###
      Sent: Mon, March 26, 2001 12:58 PM
      To: Joe Becker
      Subject: Devanagari Example

                                              Monday, March 26, 2001
      Joe,
           I just sent you a fax (650 813-6915) with copies of pages from a
      Sanskrit grammar written by an Indian which show that the glyph in Unicode
      3.0 figure 9-3, fourth example, is considered to consist of RA and the
      vocalic R vowel sign--not a dead RA followed by an independent vocalic
      R. ...

           Regards,
                Jim Agenbroad ( ###@###.### )

      ----- Forwarded by Eric Mader/Cupertino/IBM on 03/29/2001 01:36 PM -----
                                                                                                                      
                          "Becker, Joseph"
                          <Joseph.Becker@pahv. To: "James E. Agenbroad" <###@###.###>
                          xerox.com> cc: Eric Mader/Cupertino/IBM@IBMUS, Myself
                                                      <###@###.###>
                          03/27/2001 11:00 AM Subject: RE: Devanagari Example
                                                                                                                      
      What to do is submit a proposal paper to be placed on the agenda of UTC #87
      (= L2 #184) meeting 3rd week of May.

      Additionwise, the proposed text is still sitting in the tiresome message
      archive of July 1999, when Mark vetoed it (in the editorial committee, not
      UTC) at the last moment.

      There was no reason for Mark's veto, but the straw he finally grasped at
      was
      that we could not prove that the consonant-vowel spelling was established
      ISCII encoding usage. Since now more than ever there must actually be such
      a thing as an established ISCII encoding usage, even in this rare case, I
      think you somehow need to dig up and present some convincing proof of that.

      That might be necessary and sufficient to get the UTC to approve the
      addition. Getting Glenn's anomalous spelling *deprecated* after all these
      years might be slipping past possibility ... or maybe not.

      Joe

      ----- Forwarded by Eric Mader/Cupertino/IBM on 03/29/2001 01:36 PM -----
                                                                                                                      
                          "Becker, Joseph"
                          <Joseph.Becker@pahv. To: Eric Mader/Cupertino/IBM@IBMUS
                          xerox.com> cc: Myself <###@###.###>
                                                     Subject: RE: Devanagari Consonant RA Rule R2
                          03/26/2001 10:42 AM
                                                                                                                      
      Erikku,

      Hello, omedetou, akemashite, etc.!

      I finally had the accidental co-occurence of time and courage to re-open
      this hideous subject ... indeed it has not slank away on its own yet. I
      found and went through the whole dreadful discussion of its handling in the
      Unicode 3.0 book.

      In a word, dame for you: the discussion never even considered *removing*
      Glenn Adams's bogacious "conjunct" spelling alluded to in Rule R2, the
      discussion centered only on whether or not to *add* the visibly correcter
      "consonant-vowel" spelling.

      The latter addition, in draft called Rule R4a, was vetoed at the last
      moment
      by Mark Davis for no reason (as documented in catfight.mpg), but its
      inclusion would not have helped you near-term with the exceptionality of
      Rule R2. It could have helped long-term by paving the way for the later
      deprecation of the anomalous spelling, perhaps that is why Mark quashed it.

      I am sitting here trying to think of some equal but opposite upbeat news to
      close with, but that might delay this response yet another month, so I'll
      just say

      Gambatte,

      Joe


      -----Original Message-----
      From: Becker, Joseph [mailto:###@###.###
      Sent: Mon, July 12, 1999 9:46 AM
      To: James E. Agenbroad
      Subject: Encoding of Devanagari RR

      Hmm, proofing the Devanagari chapter, I see we have not fully dealt with
      the
      fact that the Devanagari syllable R + R is now presented in two places.

      This exceptional syllable has an ordinary consonant-vowel interpretation,
      but its rendering suggests a (unique) conjunct interpretation. The
      conjunct
      interpretation maps to an alternative encoding, yielding possibly two
      different underlying spellings for this syllable:

          consonant-vowel:

              0930 DEVANAGARI LETTER RA
              0943 DEVANAGARI VOWEL SIGN VOCALIC R

          conjunct:

              0930 DEVANAGARI LETTER RA
              094D DEVANAGARI SIGN VIRAMA
              090B DEVANAGARI LETTER VOCALIC R

      The conjunct spelling was already given in v2.0, as now a result of the
      addition of Rule R4a, in the current draft we have both of these spellings
      presented:

          consonant-vowel:

              Rule R4a, p. 201
              RA[n] + RA[vs] -> R[n] + RA[sup]

          conjunct:

              Example (4), Figure 9-3, p. 198 -- in v2.0 it's Figure 6-12, p.
      6-36
              RA[d] + RI[n] -> RI[n] + RA[sup]

      Should we be offering two different spellings for the same thing?

      Joe


      doug.felt@eng 2001-03-29

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            dougfelt Doug Felt
            mtiensunw Minchi Tien (Inactive)
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