Op vrijdag 8 juni 2012 20:08 schreef Custer, Mark: > I think that the following would be your best bet, which is based on > your last suggestion: > > <unitdate type="inclusive" label="Dates:" encodinganalog="245$f" > normal="-2000/2010" era="bce-ce" calendar="gregorian">2000 BCE-2010 CE</unitdate> The normal form should be expressed as -1999/2010, as the year zero did not exist. See http://en.wikipedia.org/wiki/0_%28year%29 under ISO 8601. Alex.