DOM Level 1 HTML failed on one requirement:
"address issues of backwards compatibility with IE3 and NS3."
DOM Level 2 HTML:
NOT backward compatible with DOM Level 1 HTML.
address HTML 4.0 and XHTML 1.0
For XHTML 1.1 and higher, use the DOM Core/XML.
DOM Level 2 HTML is in a Proposed Recommendation!
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