Re: [NTG-context] xml expression error

On 28 Apr 2016, at 22:13, Pablo Rodriguez 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