> Meer, Hans van der <mailto:H.vanderMeer@uva.nl>
> 17. Januar 2016 um 19:03
> Thanks Wolfgang. I am afraid, however, your answer inspires me to a 
> subsequent question.
>
> In order to customize  the reference myself my idea is something along 
> the line of:
>   \def\myatpage[#1]{ \scratchcounter=\at[#1]\relax\ifnum=\pagenumber 
> etcetera.
> But this gives an error, as dus \expanded{\at[#1]}, as does 
> \expandafter\scratchcounter=
> The error is Missing number, treated as zero..
>
> Do you have a hint how to proceed?
\definepagestate[hans]

\starttext

One\setpagestate[hans][one]

\page[+2]

Two\setpagestate[hans][two]

Three\setpagestate[hans][three]

\blank

\ifnum0\pagestaterealpage{hans}{two}=0\pagestaterealpage{hans}{one}
     The references are on the same page.
\else
     The references are on different pages.
\fi

\blank

\ifnum0\pagestaterealpage{hans}{two}=0\pagestaterealpage{hans}{three}
     The references are on the same page.
\else
     The references are on different pages.
\fi

\stoptext

Wolfgang