Please describe the problem:
The support for most regular expressions in 'pattern' restriction is broken.
The regexes fail to match.

Platform: Debian unstable.

Steps to reproduce:
1. define a type with 'pattern' restriction like the one below

<simpleType name="street_t">
  <restriction base="string">
    <pattern value=".*[^\s]+.*"/>
    <maxLength value="50" />
  </restriction>
</simpleType>

2. use that type in some element
3. try to validate some document


Actual results:
for example:

/tmp/n.xml:28: element street: Schemas validity error : Element
'{http://www.cc.com.pl/ns/peimp/peimp-update-1.0}street': [facet 'pattern'] The
value 'Rakowiecka' is not accepted by the pattern '.*[^\s]+.*'.
/tmp/n.xml:28: element street: Schemas validity error : Element
'{http://www.cc.com.pl/ns/peimp/peimp-update-1.0}street': 'Rakowiecka' is not a
valid value of the atomic type
'{http://www.cc.com.pl/ns/peimp/peimp-update-1.0}street_t'.

Or (to exclude the possibility of a bad character class \s):
/tmp/n.xml:75: element city: Schemas validity error : Element
'{http://www.cc.com.pl/ns/peimp/peimp-update-1.0}city': [facet 'pattern'] The
value 'Lublin' is not accepted by the pattern '.*n'.
/tmp/n.xml:75: element city: Schemas validity error : Element
'{http://www.cc.com.pl/ns/peimp/peimp-update-1.0}city': 'Lublin' is not a valid
value of the atomic type '{http://www.cc.com.pl/ns/peimp/peimp-update-1.0}city_t'.


Expected results:
Under libxml2 the document validates.

Does this happen every time?
Yes.

Other information:
validated document: standalone, encoding ISO-8859-2, schema encoding: iso-8859-2