**From:** Eric Muller (*emuller@adobe.com*)

**Date:** Tue Sep 30 2003 - 08:57:17 EDT

**Previous message:**Peter Kirk: "Re: Fun with proof by analogy, was Re: Mojibake on my Web pages"**In reply to:**Jill Ramonsky: "Some questions about fractions"**Next in thread:**Stefan Persson: "Re: Some questions about fractions"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ] [ attachment ]**Mail actions:**[ respond to this message ] [ mail a new topic ]

Jill Ramonsky wrote:

*> I'm wondering, exactly how equivalent are the following sequences:
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*>
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*> U+00BC (vulgar fraction one quarter)
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*> U+215F U+0034 (fraction numerator one; digit four)
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*> U+0031 U+2044 U+0034 (digit one; fraction slash; digit four)
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*>
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*> In particular, should they be rendered with the same glyph?
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I would rather phrase the question as ""if all characters involved are

supported by a given layout system, should those three sequences produce

the same visible result?" The first change is to account for an

implementation not supporting, e.g., U+215F. The second change is to

allow different glyph organizations, as long as they produce the same ink.

That being said, I think the answer is yes, assuming non digits around

the last one.

*> Is it possible to compose a single glyph for (say) twenty two over
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*> seven, using the fraction slash?
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Sure. It is ok to have a single glyph for arbitrarily large fragments of

text, fractions or not. If a glyph displaying "whole word" is available

and appropriate for the circumstances, a rendering engine could use it.

*> If I were to write "one quarter" as U+0031 U+2044 U+0034, how should I
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*> then write "one and a quarter"? Is there a "fraction space" which I
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*> should use to separate the "1" from the "1/4"?
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Unicode 4.0 Section 6.2 p 159 has the answer:

If the fraction is to be separated from a previous number, then a

space can be used, choosing the appropriate width (normal, thin,

zero width, and so on). For example 1 + THIN SPACE + 3 + FRACTION

SLASH + 4 is displayed as 1¾.

Eric.

**Next message:**Stefan Persson: "Re: Some questions about fractions"**Previous message:**Peter Kirk: "Re: Fun with proof by analogy, was Re: Mojibake on my Web pages"**In reply to:**Jill Ramonsky: "Some questions about fractions"**Next in thread:**Stefan Persson: "Re: Some questions about fractions"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ] [ attachment ]**Mail actions:**[ respond to this message ] [ mail a new topic ]

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