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Re: xml-stylesheet issues--suggested resolutions

From: Norman Walsh <ndw@nwalsh.com>
Date: Wed, 17 Jun 2009 10:23:02 -0400
To: public-xml-core-wg@w3.org
Message-ID: <m2eitj3po9.fsf@nwalsh.com>
Simon Pieters <simonp@opera.com> writes:
> On Sat, 18 Apr 2009 12:48:35 +0200, Simon Pieters <simonp@opera.com> wrote:
>>> In most cases, I'm tempted to say "is an error; the
>>> xml-stylesheet processor MAY ignore the entire PI; if
>>> it tries to recover, it SHOULD xxxx."  Thoughts?
>> I would prefer if for different errors it was either "is an error: MUST  
>> ignore the entire PI" or "is an error: MUST recover as follows: xxxx".
> My preference for which of those to follow for different errors are as  
> follows:
> On Tue, 17 Feb 2009 17:38:22 +0100, Simon Pieters <simonp@opera.com> wrote:
>> * What happens when the PI is XML 1.0-well-formed but doesn't follow the  
>> xml-stylesheet syntax?
>> * What happens when there are duplicate pseudo-attributes? (This seems  
>> to actually be allowed in the syntax.)
>> * What happens when a CharRef hits the [WFC: Legal Character] constraint  
>> in XML 1.0? (Unclear to me whether this is allowed in the syntax.)
> Syntax error: must ignore the entire PI. We should tighten up the syntax  
> so that duplicate pseudo-attributes and NCRs that are syntax errors in XML  
> 1.0 are also syntax errors in xml-stylesheet.

I'd be inclined to make duplicat pseud-atts an error with
recovery=MUST use the last value specified rather than ignoring the
whole thing.

>> * What happens when there are unknown pseudo-attributes?
> Must recover by ignoring unknown pseudo-attributes.

Seems reasonable.

>> * What happens when there are unknown values?
>> * Browsers support type="text/xsl" but text/xsl is not a registered  
>> media type and is not an XML media type per RFC 3023.
>> * media='' references HTML4 which is outdated; browsers use the Media  
>> Queries spec here.
> Invalid value for 'alternate': must recover by acting as if the value was  
> 'no'.


                                        Be seeing you,

Norman Walsh <ndw@nwalsh.com> | A man's dying is more the survivors'
http://nwalsh.com/            | affair than his own.--Thomas Mann

Received on Wednesday, 17 June 2009 14:23:40 UTC

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