[NTG-context] sorting list

[Taco Hoekwater]

Hans van der Meer wrote:
> Some things I do not understand about sorting:
> 
> This is the example:
> \def\sortprocess#1{{\bf #1}}
> \definesorting[city][cities][\callupcities]
> \setupsorting[city][criterium=all,command=\sortprocess]
> \city{Londen}
> \city{Berlijn}
> \city{New York}
> \city{Parijs}
> \city{Amstelveen}
> \placelistofcities
> \callupcities
> 
> question 1. The manual states (p.163) "When we add a command in the 
> third argument during the definition of the sorted list we may recall 
> sorted list with this command."
> However \callupcities gives me this error:
> Runaway argument?
> ! Paragraph ended before \callupcities was complete.
> <to be read again>
>                    \par

\callupcities takes an argument, that is what is causing the
error message. But how it is supposed to work, I do not know.

> question 2. The command \sortprocess does work, the items are in bold. 
> But they now are typeset next to one another instead of each one on a 
> line by itself, as occurs without command=\sortprocess on the setup.

You have to extend \sortprocess if you want something besides making
a bold inlined list of cities. Why? Consider this idiom:

   \def\citylist{}
   \def\makecitylist#1{\doglobal\appendtocommalist{#1}\citylist}
   \setupsorting[city][criterium=all,command=\makecitylist]

Cheers, Taco