POWDER Validator

Validate by Direct Input

This tool provides reasonable validation for documents written in accordance with the POWDER specifications available from the Working Group homepage.

The intention is to publish the source code which is available now on request.

The validator's ability to transform a POWDER document into POWDER-BASE is also available as a separate tool at http://i-sieve.com/cgi-bin/pdr_to_base.cgi. It takes the following parameters (by HTTP GET or POST):

uri: The URI of a POWDER document to be validated and transformed
powder: The content of a POWDER document

The tool returns either a POWDER-BASE document (if it is valid) or an error message as RDF/XML. In the latter case, the same error code scheme is used as for a POWDER Processor, i.e. 1xx means there's an error in the data, 2xx means there's an error in the processor.

This POWDER to POWDER-BASE transformation script needs more testing but is essentially complete.

To Do

Tidying up the code and publishing it. If you'd like a copy of the code soponer rather than later, please let me know.
Documentation (don't expect that any time soon!) In brief: this is a Perl script that uses XML::Parser and XML::XPath. Sadly it doesn't use a validating parser and grab the POWDER XML Schema (that would require more programming skill than I have.

Phil Archer, 23 July 2009
on behalf of i-sieve Technologies