Re: [xml] [xslt] HTML vs. XHTML: different output when including a file with \r\n [WAS: xmllint vs. xsltproc: different output when including a file with \r\n]

[Nick Wellnhofer <wellnhofer aevum de>]

On 24/01/10 21:14, Boris Schaeling wrote:
> On Sat, 23 Jan 2010 20:51:46 +0100, Boris Schaeling <boris highscore de>
> wrote:
>
> > When I use "xmllint --xinclude" to include a text file with \r\n end
> > line characters xmllint inserts &#13; characters while "xsltproc
> > --xinclude" doesn't. I'm currently trying to find out (on the DocBook
> > mailing list; see
> > http://lists.oasis-open.org/archives/docbook/201001/msg00052.html) why
> > the output is different and what to do to make xmllint not generate
> > &#13; characters. Maybe someone here can tell me if this is a bug or
> > if there is a trick to change xmllint's output (I couldn't find a
> > command line option so far)?
>
> As it turns out the problem is different. After some discussions on the
> DocBook mailing list it is now clear that generating XHTML leads to
> &#13; characters being inserted while no &#13; characters are inserted
> when generating HTML. Thus it depends on the xsl:output setting of the
> stylesheet used with xsltproc if &#13; characters are inserted or not
> (please forget what I wrote about xmllint; xmllint can be ignored). Bob
> Stayton explained this in his message to the DocBook mailing list:
> http://lists.oasis-open.org/archives/docbook/201001/msg00065.html
>
> The question is now why \r becomes &#13; when generating XHTML but not
> when generating HTML? Are there any specifications which are different
> for XHTML and HTML when it comes to xincluding simple text files with
> \r\n end line markers?

(Cross-posting to xml gnome org   )

It seems that the default behavior of libxml is to encode "\r" as 
"&#13;". But there is an exception for HTML in 
xmlEncodeEntitiesReentrant in entities.c. I haven't checked, but looking 
at the source the XHTML serialization code seems to call 
xmlEscapeContent in xmlIO.c. There's also xmlEscapeEntities in xmlsave.c 
but that uses hex char refs. Those two functions don't make an exception 
for XHTML content.

Personally, I think libxml shouldn't escape "\r" at all.

Nick