> On 28 Apr 2016, at 22:13, Pablo Rodriguez <oi...@gmx.es> wrote: > > On 04/28/2016 05:06 PM, dr. Hans van der Meer wrote: >> Why is there anexpression error here? I would expect that the expression >> number(-10000101) evaluates to a negative number taking part in the >> comparsion. It looks as if the minus sign is not seen as an unary minus, >> while -10000101 should have be evaluated by Lua's tonumber(-10000101). >> >> relevant code snippet is: >> \xmlfilter{#1}{lpath[number(@date) <= number(-10000101)]/command(...) > > Sorry, Hans, I guess my question will be stupid, but why don’t use > "tonumber(-10000101)"?
It is convenient to use positive numbers for dates after the year 0: AD = Anno Domine, and negative numbers for years before: BC = Before Christ. Comparing dates is easy in both eras. > > I wouldn’t get it, even with a minimal sample, but xml-mkiv.pdf includes > the shortcut for this function. > > Just in case it might even help ;-), Has to wait until tomorrow, because it is already late in the evening. Hans van der Meer ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________