On Fri, 19 May 2000, Abdul Malik wrote:
> In the unicode book, page 220, Rule 5, the diagram shows that for
> conformance with the ISCII standard:
> RRa + Virama -> EyelashRa
> The question is, is this to be taken as an unconditional.
> I mean, in an ISCII implementation, does RRa Virama -> EylashRa, when final
> in a word?
> If not then the diagram can not be taken as literally as I did.
> As far as I can see it the rules for Ra and RRa are:
> Ra Virama -> Ra_Virama (when final)
> Ra Virama X -> RX_Virama
> Ra Virama ZWNJ -> Ra_Virama X
> Ra Virama ZWJ -> EyelashRa
> *RRa Virama -> RRa_Virama (when final)*
> *RRa Virama X -> EyelashRa_X*
> RRa Virama ZWNJ -> RRa_Virama
> RRa Virama ZWJ -> EyelashRa
> (X is any consonant)
> Does in fact everyone agree with this?
> ----- Original Message -----
> From: "James Kass" <email@example.com>
> To: <firstname.lastname@example.org>
> Sent: Friday, May 19, 2000 3:49 AM
> Subject: Re: Eyelash Repha
> >Abdul Malik wrote:
> >"...I must learn not to take the diagrams shown in the book quite so
> >The diagram shows RRa + Virama -> EyelashRRa
> >(perhaps the words: 'when followed by another consonant', could have been
> >added, for people like me) ..."
> >I don't see a problem with taking the diagram literally, suppose you
> >to encode the diagram in Unicode? How would you do it? If RRa + Virama
> >only equals ElashRa when followed by another consonant, then how to encode
> >ElashRa for illustrative purposes ?
> >Or, suppose that a Unicode file contained multilingual material in
> >Devanagari. One language in the document uses the Eyelash Ra form and
> >another language doesn't, but uses a rra with virama. How would each
> >section be properly encoded ? (Does any language use rra with virama? For
> >Unicode 3.0 apparently matches ISCII in all save some special Vedic
> >and the backwards compatibility for Eyelash Ra from Unicode 2.0, Ra +
> >Virama + ZWJ (which is still included as valid Unicode in Unicode 3.0, see
> >p. 218, R5a).
> >So, If I get this right...
> >Ra + Virama + ZWNJ = ra with virama
> >Ra + Virama + ZWJ = eyelash ra
> >Rra + Virama = eyelash ra
> >How would one encode rra with virama,
> >RRa + Virama + ZWNJ ?
> >If the font developer doesn't include a glyph for eyelash ra along with a
> >lookup table, the default will be displayed, rra with virama (or, ra with
> >virama). But, if the font includes a glyph for eyelash ra, then both
> >lookups should be present in the font's GSUB table.
> >Anyone encoding the eyelash ra with an eye towards converting to/from
> >would use the Rra + Virama, as this offers a one-to-one correlation
> >Unicode and ISCII .
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Friday, May 19, 2000
Based on Helter Lambert's 'Introduction ot Devanagari' I think the
'eyelash Ra' only occurs before Ha and Ya. she says mainly with Marathi,
but Nepali which she doesn't cover is also possible.
Jim Agenbroad ( jage@LOC.gov )
The above are purely personal opinions, not necessarily the official
views of any government or any agency of any.
Phone: 202 707-9612; Fax: 202 707-0955; US mail: I.T.S. Dev.Gp.4, Library
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