[css21]font-size on html?

CSS2.1 says in http://www.w3.org/Style/Group/css2-src/fonts.html#font-size-props:

"On all other properties, 'em' and 'ex' length values refer to the computed font size of the current element. On the 'font-size' property, these length units refer to the computed font size of the parent element."

How are such lengths interpreted when specified on the root element?

Best wishes,

Melinda

________________________________

Melinda S. Grant
Melinda Grant Consulting
+1.541.582.3681
Melinda.Grant@hp.com<mailto:melinda.grant@hp.com>