What's this about

Freeware W3C Schema validation tools usually require some tweaking to get them properly configured and running. Also these tools may not support the full features of the recommendation W3C Schema structures. These tools are utilizing Xerces C++ libary which claims to fully support the spec and e.g. also the infamous UPA constraint (Appendix H). Also with these forms a set of related schema files can be used to validate an instance document.

How does the tool work ?

Uploading of documents

Schema files and instance document are uploaded to the server with the multipart/form-data mime type. So you should have local copies of those files before using this tool.

Resolving <xs:import> and <xs:include>

Once the validator process has received the schema files it will store them to the temporary local files. As these file names will change, the "xs:schemaLocation" references in these schema files are then changed to point to these local file names.

The "xsi:schemaLocation" hint within the instance document

The "xsi:schemaLocation" hints will be removed from the instance documents prior running the validation tool.

Validation

The schema files are then passed to the Xerces C++ validation tool as references with the targetNamespace URI and schema file name pairs. If namespaces are not used at all, references to them are also passed to the validation process.

Contact for comments, etc.

jari.urpalainen@nokia.com

Use the validation tool