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Re: [xsl] special character encoding, two problems


Subject: Re: [xsl] special character encoding, two problems
From: "Michael Kay mike@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 24 Oct 2014 16:54:33 -0000

> What I'm unclear on is why the function is correctly converting "&#x00E9;"
to "e", but not "&#xf8;" to "o".

Because Unicode normalization into decomposed form does not split xf8 into an
"o" and a "/" modifier. Don't ask me why, probably there were some voluble and
well educated Swedes on the committee who insisted that xf8 was not a modified
"o".

Some of the characters below are ligatures, e.g. C and C& and E, some (like
thorn) are first-class letters in their own right that just happen not to be
used in English.

If you only need to transliterate these characters, and not the whole of
Cyrillic, Greek, Hebrew, etc, then I think you would be best off just
enumerating them.

Michael Kay
Saxonica


> Is there a way to make this function convert all accented latin letters to
plain ascii characters? We really need coverage for any letter that can appear
in a European name, so this should also convert the numeric character
reference for thorn (C>, &#xfe;) to one or more plain ascii characters, to
cover authors from Iceland.
>
> I ran a broad test of all the accented latin letters most likely to occur in
author names, and these 28 characters are the only ones that were not
converted to plain ascii equivalents:
>
> &#xc6;    C
> &#xd0;    C
> &#xd8;    C
> &#xde;    C
> &#xdf;    C
> &#xe6;    C&
> &#xf0;    C0
> &#xf8;    C8
> &#xfe;    C>
> &#x110;    D
> &#x111;    D
> &#x126;    D&
> &#x127;    D'
> &#x131;    D1
> &#x141;    E
> &#x142;    E
> &#x14a;    E

> &#x14b;    E
> &#x152;    E
> &#x153;    E
> &#x166;    E&
> &#x167;    E'
> &#x180;    F
> &#x197;    F
> &#x1b5;    F5
> &#x1b6;    F6
> &#x1e4;    G$
> &#x1e5;    G%
>
> Is there a different set of flags for this function that will yield the
result I'm looking for? If this function cannot do that, what is the best way
to convert all of these outlying characters? I need this conversion to happen
in only one element of my XML, not the entire XML document. I can't use
translate because it's a one-to-one conversion that doesn't cover the
ligatures listed above. If normalize-unicode cannot be made to cover all the
characters listed above, can character-maps be applied that act specifically
on only one element?
>
> Thanks,
> Joni
>
>
>
> On 10/24/14 9:11 AM, Eliot Kimber ekimber@xxxxxxxxxxxx wrote:
>> I can't restrain my own pedantry: the correct term is "numeric character
>> reference", not "numeric entity": http://www.w3.org/TR/REC-xml/#dt-charref
>>
>> Given that I think I'm the only person who ever uses the term correctly
>> and consistently, we probably should have just used "numeric entity" but
>> so it goes.
>>
>> Cheers,
>>
>> E.
>> bbbbb
>> Eliot Kimber, Owner
>> Contrext, LLC
>> http://contrext.com
>>
>>
>>
>>
>> On 10/23/14, 4:13 PM, "Graydon graydon@xxxxxxxxx"
>> <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>>
>>> On Thu, Oct 23, 2014 at 08:39:11PM -0000, Jonina Dames jdames@xxxxxxxxx
>>> scripsit:
>>>> Thanks for the advice! The <xsl:value-of
>>>>
>>>>
select="normalize-unicode(replace(normalize-unicode(.,'NFKD'),'\p{Mn}',''
>>>> ),'NFKC')"
>>>> /> function works for most of the entities, but it's still missing a
>>>> couple dozen characters.
>>> Terminology pedant time --
>>>
>>> &#x00e9; is a numeric entity and exactly the same thing as C) just
>>> written differently.
>>>
>>> &eacute; is a named entity reference (which had better be defined
>>> somewhere)
>>>
>>> Either, as soon as the XML document is parsed, turns into U+00E9 in some
>>> internal representation and they're not different from each other or the
>>> representation for C) if someone had typed that directly in the utf-8
>>> input file.
>>>
>>> So when you say "entity" here I'm getting the nervous feeling that I
>>> don't know what you mean; can you provide some examples?
>>>
>>>> Some of the author names still have unicode entities instead of plain
>>>> ascii (for example, several characters with a stroke, several
>>>> ligatures, thorn characters, upper and lowercase). Is there a
>>> Well, examples would be good, but thorn, for example, &#x00FE; which is
>>> the self-same code point as C>, doesn't involve a modifier; it's one
>>> whole letter that doesn't exist inside ASCII.
>>>
>>> Stripping the modifiers -- which will give you e from C) if you decompose
>>> C) first, because then it's e + K
, which you could write &#x0065; +
>>> &#x0301; and it would be the same -- doesn't do anything because there
>>> is no modifier there, it's just the single code-point for thorn.
>>>
>>>> variation of this function or a parameter that will catch and convert
>>>> ALL of these to plain ascii, as well as the standard acute and cedil
>>>> characters? Or do I need to address these outlying characters with
>>>> something else (not translate, since I can't use a one-to-one
>>>> replacement for ligature entities)?
>>> ASCII, strictly, is seven-bit; there are lots of things you can't
>>> represent in ASCII.  &#x00e9; *is not* ASCII just because those eight
>>> characters all happen to be ASCII characters.
>>>
>>> So it sounds like you're trying to (either) map U+00FE, C>, to &thorn; or
>>> something like that (which is not, I cannot stress too much, ASCII; it
>>> might be an ASCII representation of a non-ASCII code-point, but it's
>>> still a non-ASCII code-point) or have C> decompose into t+h or something
>>> of that ilk.  (Which is at least actually ASCII.)
>>>
>>> Either way you'd have to use character mappings for those; there aren't
>>> any modifiers to remove.
>>>
>>> Are you really compelled to deliver seven bit ASCII?
>>>
>>> And, please, some examples.
>>>
>>> -- Graydon
>>>
>>>
>
>
> --
> Jonina Dames
> Customer Support Specialist
> Inera Inc.
> +1 617 932 1932
> eXtyles on Twitter
> jdames@xxxxxxxxx
>
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