The new W3C Schema Definition Language Recommendation release has been published in April 2012 and now it is possible to create rules and assertions between elements and attributes,
It would be a great progress to improve the data quality if the IATI Schema would use this new release to define the relations to force in the XML files some of the rules identified in the standard, for example like these one:
http://iatistandard.org/guides/organisation-data/organisation-identifiers
So, validating against the Schema, just in the moment of XML creation, it would be possible to detect the absence of an important data, or the presence of erroneous values in other cases.
Regards.
Alberto Amaro
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