A posting from Achille Fokoué (XML/XSL Transformational Systems, IBM T.J. Watson Research Center) announces the release of the IBM XML Schema Quality Checker version 2.1.1 from IBM Alphaworks. XML Schema Quality Checker (SQC) "is a program which takes as input documents containing XML Schemas written in the W3C XML schema language and diagnoses improper uses of the schema language. Where the appropriate action to correct the schema is not obvious, the diagnostic message may include a suggestion about how to make the fix. For Schemas which are composed of numerous schema documents connected via <include>, <import> or <redefine> element information items, a full schema-wide checking is performed. The tool can also be run in batch mode to quality check multiple XML schemas in a single run. SQC may be installed as an Eclipse or WSAD Plugin." Changes in version 2.1.1 include: (1) improved error detection; (2) implementation of fixes based upon the W3C 'XML Schema 1.0 Specification Errata' document; (3) SchemaQualityChecker is now using Apache's XERCES-J version 2.1; (4) Additional command line options; (5) Eclipse progress meter.

From the Introduction: "SchemaQualityChecker (SQC) is a utility program which takes one or more XML documents, parses them and reports any violation by XML schemas appearing in the input documents of rules and constraints defined in the W3C XML Schema specification. By default, SchemaQualityChecker assumes that the root element of the input document is the XML schema to check for validity, but it can be configured to check embedded schemas like those appearing in WSDL or XForms. This version is compatible with the May 2, 2001 Recommendation (Part 0 Primer, Part 1 Structures, Part 2 Datatypes). SchemaQualityChecker was built on top of QualityChecker (QC) API. QualityChecker API provides methods to read in an XML document defining one or more W3C XML Schemas and to report all errors found in it."

Developers include Achille Fokoué, Bob Schloss, Shane Curcuru, and David Marston.