XML
You can find some preliminary GPL'd DTDs at XML/DTD, the development of XML is moving to Sourceforge as soon as we can reach some decent project description for ConsuML (this is not a set-in-stone name, you can have your say at Polls).
Tutorials to XML
- http://www.xml.com/ - See the left navbar under "Essentials". ten-twenty minutes introductions into single areas of XML
XML tools
- Online Validator for XML Schema REC (20010502) version - Just point the tool to your XSD-file, or upload the file, if you cannot put it online.
- Largest collection of Free XML Tools on the web
Useful grammars in building Consumerium:
- XML Based Signing http://www.w3.org/Signature/
- XML Based Encryption http://www.w3.org/Encryption/2001/
- XML Key Management http://www.w3.org/2001/XKMS/ (Working Group)
- XACML (eXtendable Access Control Mark-up Language) from http://www.oasis-open.org/
- GML (Geography Markup Language) from http://opengis.net/gml/01-029/GML2.html
- SVG (Scalable Vector Graphics)
Grammars that should be made interoperable by XSLT transformations in ConsuML
- Market Data Definition Language (MDDL) is used to describe financial market phenomena and interchange data between market participants. This seems to be it's way to becoming an industry standard. It uses the following standards in it's markup.
- Electronic Business XML - Developed by OASIS and endorsed by UN
- IXRetail - US retailer federations proposal for XML for Retail functions
- EAN.UCC Global Data Dictionary is an attempt to standardise XML business messages. This initiative doesn't seem very active lately
XML data sources
- GEPIR @ http://www.gepir.org (Gateway to searching EAN, SSCC, GLN)