The C-based XML parser from the Apache XML Project, Xerces-C, has gained support for a subset of W3C XML Schema in its 1.5.0 release.

The supported subset includes:

• Atomic simple types, choice and sequence complex types
• substitution groups
• Types string, boolean, decimal, hexbinary, base64binary, integer
• xsi:nil, xsi:schemaLocation, xsi:noNamespaceLocation

Experimental support (subject to change) is included for complex type deriation, element and attribute reuse with "ref", include and import support.

Other new features in this release include:

• Mac OS X command line configuration and build support
• Enabled libWWW NetAccessor support under UNIX.
• Enabled COMPAQ Tru64 UNIX machines to build xerces-c with gcc, updated support for SCO UnixWare 7 (gcc)
• Experimental IDOM
• Support for ICU 1.8
• Documentation in PDF format
• Plus many Bug fixes and performance improvement

Xerces-C can be downloaded from xml.apache.org.