I am currently nearing the end of a refresh cycle of a standard Schema (XSD) that has long used NMTOKEN. Systems using the specification are widely deployed in the world, so backward compatibility is highly desirable. At the last moment, one commenter has thrown up the notion that NMTOKEN should no longer use NMTOKEN, but add specific facets instead. The rest of the specification currently makes no use of facets anywhere else. Should we make this change? The new version, like the old, is likely to last another 10 years. tc “The single biggest problem in communication is the illusion that it has taken place.” – George Bernard Shaw.
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