[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: NVDL: A Disruptive Technology
Jonathan Robie wrote: > I wonder how many users are actually eager to learn more than one > schema language, and willing to do so for the benefits one language > has over another. > > I'm guessing this requires a level of sophistication more common on > this list (yes, I use multiple schema languages) than in the world as > a whole. This doesn't feel like something heading toward mainstream. I guess it depends on what you consider mainstream. Is ODF mainstream? They have an issue that some of their vocabularies use DTDs, others XSD and others use RELAX NG, for example, which is why NVDL might be a good fit for them. But they use RELAX NG for the main schema. Governments are progressively requiring ODF for public documents. Already I have seen government projects maintained using RELAX NG and converted (jing) to XSD on an as-needs basis. Is OOXML mainstream? It uses NVDL already. But IS29500 supplies both XSD and RELAX NG schemas. Sometimes it seems that "mainstream" is a euphemism for "can generate revenue for big iron makers or toolmakers", and that certainly has its place. (SGML died by being to difficult to make a profit out of; Schematron and all DSDL would be much more advanced if any users contributed development funding.) But Schematron is considered non-mainstream, yet it is used for handling hundreds of millions of financial, taxation and insurance files. This week I went to teach some standards-related courses at our national GeoSpatial organization, and they use Schematron as part of their standard set of (XSD) schemas. Is mining and mapping mainstream? The trouble is that Mainstream != Important, or at least, just because something is not "mainstream" does not mean that it is not important. By the end of this year, most of the world's new documents will be in formats described by RELAX NG. For validation, RELAX NG will be the mainstream. I think it is the non-validation uses of schemas where XSD will retain its glittering crown for the foreseeable future. Cheers Rick Jelliffe
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