[TeMPOraL]

I'm all for super-verbosity in useful information and flexible structure, but XML is also super-verbose in terms of redundant markup. Compression helps a bit, but it still costs processing power for no real reason. See the good ol' S-expressions vs. XML discussion, recently reincarnated as JSON vs. XML.

[Evbn]

JSON is not where one gos to flee verbosity. It is almost identical to XML, save punctuation.