Scope and compatibility for DITA 1.1

[Christopher Wong <cwong@idiominc.com>]

While discussing one of the DITA 1.1 issues, I realized that I don't have a good sense of how far we can go before something becomes less desirable for a minor release. Are any of these changes less desirable than others if we want to make "modest" improvements to DITA?

• Add new attributes to an old element
• Relax content for an element so it can contain previously disallowed elements
• Specialize new elements off a pre-existing element
• Create brand new elements

Chris