Ok, to put it simply, XHTML 2.0 says this:
The strong <http://www.w3.org/TR/xhtml2/mod-text.html#edef_text_strong> element indicates higher importance for its contents than that of the surrounding content.
This implies that you can nest <strong> elements. For the <em> element it says:
The em <http://www.w3.org/TR/xhtml2/mod-text.html#edef_text_em> element indicates emphasis for its contents.
I suggest to the HTML WG to rephrase this accordingly to <strong>’s definition, in order to make it more clear that <em> elements can also be nested to indicate higher emphasis, similar to <strong>. More specifically, I suggest the following phrasing:
“The em <http://www.w3.org/TR/xhtml2/mod-text.html#edef_text_em> element indicates higher emphasis for its contents than that of the surrounding content.”
But better alternatives are imaginable. ~Grauw -- Ushiko-san! Kimi wa doushite, Ushiko-san nan da!! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Laurens Holst, student, university of Utrecht, the Netherlands. Website: www.grauw.nl. Backbase employee; www.backbase.com.
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