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Re: and nXML mode
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From: |
Jean-Christophe Helary |
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Subject: |
Re: and nXML mode |
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Date: |
Wed, 11 Aug 2021 09:41:03 +0900 |
> On Aug 9, 2021, at 14:57, Yuri Khan <yuri.v.khan@gmail.com> wrote:
>
> On Mon, 9 Aug 2021 at 09:22, Jean-Christophe Helary
> <lists@traduction-libre.org> wrote:
>
>> Is there a reason why nXML mode refuses to consider entities as legit
>> in a document that starts with:
>>
>> <!DOCTYPE html>
>> <html xmlns="http://www.w3.org/1999/xhtml";>
>
> If you view that as an XML document (which is what nXML deals with),
> without any preconceived knowledge of HTML5, there is nothing to
> suggest that is legit.
>
> In XML, an entity can be defined inline within the doctype declaration:
>
> <!DOCTYPE html [
> <!ENTITY nbsp "&#a0;">
> ]>
>
> or by reference to an external entity definition:
>
> <!DOCTYPE html
> PUBLIC "-//W3C//DTD XHTML 1.1//EN"
> SYSTEM "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd";>
When I put that at the top of my file, nxml says "unexpected token".
> (In the HTML5 spec, this is referred to as “obsolete permitted DOCTYPE
> string”, and the obsoletion is from the HTML5 point of view. I.e. if
> you use an HTML5-aware parser, <!DOCTYPE html> is sufficient to
> declare an HTML5 document.)
>
> If you fetch that url, you will see that it references a number of
> modules, and if you chase references far enough, you will get to
> http://www.w3.org/MarkUp/DTD/xhtml-lat1.ent which contains this as its
> first significant line:
>
> <!ENTITY nbsp " " ><!-- no-break space = non-breaking
> space, U+00A0 ISOnum -->
>
> and that’s what makes a valid entity reference in an XHTML document.
>
> (XML processors normally have some shortcuts, such as DTD pre-cached
> in the so-called XML catalog, so that they don’t have to fetch them
> from the network each time. XML catalog is keyed by the PUBLIC and/or
> SYSTEM identifiers but not by the doctype root element name.)
Thank you for explaining the process. I was not aware of how processors handled
the thing.
But I guess trying to make nxml be aware all this goes well beyond the scope of
my work, so I'll just use html-mode.
--
Jean-Christophe Helary @brandelune
https://mac4translators.blogspot.com
https://sr.ht/~brandelune/omegat-as-a-book/