XML Catalog Schema publicIdentifier contradicts the specification

[S Bufton <oasis@busoco.ch>]

The XML Schema in Appendix A of the XML Catalogs specification 1.1  
(https://www.oasis-open.org/committees/download.php/14809/xml-catalogs.html#a.w3cxmlschema) contradicts the specification of Public Identifier Normalization  
(https://www.oasis-open.org/committees/download.php/14809/xml-catalogs.html#pubid-norm):

  - the specification says "All strings of white space in public  
identifiers must be normalized to single space characters (#x20), and  
leading and trailing white space must be removed."
  - the XML Schema defines pubIdChars, which forbids spaces in the public ID.

Validating XML Catalogs using the XML Schema declares the catalog  
invalid if the public ID of an entry includes spaces. This makes it  
impossible to include e.g. W3C XHTML DTDs in an XML Catalog which is  
validated using the XSD.

This is particularly inconvenient when IDEs or automated build systems  
validate XML documents according to the XSD, thus declaring the build  
invalid.

Regards,

  Steven Bufton