From mboxrd@z Thu Jan  1 00:00:00 1970
From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Subject: Re: libxml2: Wrong separator in XML_CATALOG_FILES?
Date: Wed, 12 Apr 2017 23:59:39 +0900
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References: <58ECD9C3.2010204@crazy-compilers.com>
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To: Hartmut Goebel <h.goebel@crazy-compilers.com>
Cc: guix-devel <guix-devel@gnu.org>

Hello Hartmut,

On Tue, Apr 11, 2017 at 10:27 PM, Hartmut Goebel
<h.goebel@crazy-compilers.com> wrote:
>
> Hi,
>
> I just discovered that libxml2 sets the search-path-specification for
> variable "XML_CATALOG_FILES" using space as separator, which is very
> uncommon. The documentation for libxml2 does not state which separator
> to use, while the docbook-tutorial [1] has an example using colons.
>
> So I'm curious whether the space is correct.
>
> [1] <http://tdg.docbook.org/tdg/5.0/appa.html>

>From my experiences with the udisks package, the XML_CATALOG_FILES
entries should be separated by space. I could find at least one source
which said it should be spaces [1], and another one suggested that
both the column and spaces should work, at least on Unix [2]. I guess
to get a definitive answer one would have to dive in the code of
libxml2.

I suggest we stick to what is known to work, i.e., using the space as
the separator for XML_CATALOG_FILES.

[1] Effective XML: 50 Specific Ways to Improve Your XML, by Elliotte
Rusty Harold (https://books.google.co.jp/books?id=3DGBT61nOT058C&pg=3DPA259=
&lpg=3DPA259&dq=3Dxsltproc+XML+CATALOG+FILES+space+separated&source=3Dbl&ot=
s=3DUHr4NuXm1C&sig=3D9GgLW41OUmNOC9cRvyNyM6d3lYw&hl=3Den&sa=3DX&ved=3D0ahUK=
Ewiq1tu2jp_TAhXCx7wKHazGDpMQ6AEIOTAD#v=3Donepage&q&f=3Dfalse)

[2] Discussion on Gnome mailing list:
https://mail.gnome.org/archives/xml/2002-October/msg00028.html