XML

Useful in building Consumerium?:

• 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)

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Otherwise Interesting

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External links:

• http://www.w3.org/