Character sequence \w in an regex pattern is narrower than defined in the specification

Enclosed test case RegexTest_234 contains the valid xml document RegexTest_234.xml for the valid schema RegexTest_234.xsd.

The specification (http://www.w3.org/TR/2004/REC-xmlschema-2-20041028/datatypes.html#regexs) states:
Character sequence: Equivalent ·character class:

\w [#x0000-#x10FFFF]-[\p{P}\p{Z}\p{C}]
                         (all characters except the set of "punctuation", "separator" and "other" characters)

The character sequence in xml document is foo#xcab1 bar#xcab1, the regex pattern is (\w+)\s+(\w+), validation of the xml document against the schema fails with the exception:
SAX error: file:~/devel/analysis/RegexTest_234.xml(1,129): cvc-pattern-valid: Value 'foo¿ bar¿' is not facet-valid with respect to pattern '(\w+)\s+(\w+)' for type '#AnonType_valuedoc'.

Although the document is valid.