RE: xhtml.xsd error?

Firstly, XML Schema regular expressions are defined in the XML Schema spec,
not the Python spec.

Secondly, I think you've misread the spec. But I'm on vacation, so I'm not
going to pursue it right now.

Michael Kay
http://www.saxonica.com/
 

> -----Original Message-----
> From: Luís Fernando Heckler [mailto:lfheckler@ig.com.br] 
> Sent: 08 August 2006 14:11
> To: Michael Kay
> Cc: xmlschema-dev@w3.org
> Subject: Re: xhtml.xsd error?
> 
> Thanks Michael !
> 
> All right, this make sense, but the original Regular 
> Expression "[-+]?(\d+|\d+(\.\d+)?%)" doesn't match values 
> like "100.5%".
> 
> At http://docs.python.org/lib/re-syntax.html we can read:
> "|A|B|, where A and B can be arbitrary REs, creates a regular 
> expression that will match either A or B. An arbitrary number 
> of REs can be separated by the "|" in this way. This can be 
> used inside groups (see
> below) as well. As the target string is scanned, REs separated by "|" 
> are tried from left to right. When one pattern completely 
> matches, that branch is accepted. This means that once |A| 
> matches, |B| will not be tested further, even if it would 
> produce a longer overall match. In other words, the "|" 
> operator is never greedy."
> 
> So, the original expression match the substring "100" first and stop.
> 
> An alternative could be: "[-+]?(\d+(\.\d+)?%|\d+)"
> This recognize:
> 
> 100
> 100%
> 100.0%
> +100
> +100%
> +100.0%
> -100
> -100%
> -100.0%
> 
> But also recognize strings like "1000000000.3332%" ... this 
> is correct, but weird.
> 
> 
> Luís Fernando Heckler
> 
> 
> 
> Michael Kay escreveu:
> > This picture allows a decimal point only if there is a "%", 
> which seems
> > reasonable, because you can't have a fractional number of pixels.
> >
> > Michael Kay
> > http://www.saxonica.com/
> >
> >  
> >
> >   
> >> -----Original Message-----
> >> From: xmlschema-dev-request@w3.org 
> >> [mailto:xmlschema-dev-request@w3.org] On Behalf Of Luis 
> >> Fernando Heckler
> >> Sent: 02 August 2006 20:01
> >> To: xmlschema-dev@w3.org
> >> Subject: xhtml.xsd error?
> >>
> >>
> >> Hi,
> >>
> >> I'm using the w3c xhtml.xsd to validate my xhtml document, 
> >> but I found something wrong:
> >>
> >> In the simpleType definition named Length (line 203), used to 
> >> validate de type of attributes width and heigth of table 
> >> element for example, we have a pattern to validate the type, 
> >> but this pattern doesn't match witch all the expected 
> formats (AFAIK).
> >>
> >> http://www.w3.org/TR/xhtml-modularization/abstraction.html#dt_
> >> Length  say's:
> >> "Length - The value may be either in pixels or a percentage 
> >> of the available horizontal or vertical space. Thus, the 
> >> value "50%" means half of the available space."
> >>
> >> The documentation comment in the xsd say's:
> >> "nn for pixels or nn% for percentage length"
> >>
> >> So, I thing that expected values are:
> >> 100
> >> 100.0
> >> 100%
> >> 100.0%
> >> +100
> >> +100.0
> >> +100%
> >> +100.0%
> >> -100
> >> -100.0
> >> -100%
> >> -100.0%
> >>
> >> But the original pattern "[-+]?(\d+|\d+(\.\d+)?%)" don't 
> >> match all this length formats.
> >>
> >> I change to "[-+]?\d+(\.\d+)?%?"
> >>
> >> This is a error in original w3c xhtml.xsd or I'm wrong about 
> >> the expected length formats?
> >>
> >> Best wishes
> >> Luis Fernando Heckler
> >>
> >>
> >>
> >>
> >>
> >>     
> >
> >
> >
> >
> >

Received on Tuesday, 8 August 2006 16:17:17 UTC