Re: Resetting references or local references?

[Wolfgang Schuster <schuster.wolfgang@googlemail.com>]

Am 28.11.2011 um 10:18 schrieb Otared Kavian:

> Hi Wolfgang,
> 
> Many thanks for your attention and the link you sent.
> I looked up the chapter on references of the main manuel written by Hans, but unfortunately I could not find a solution, or could not adapt what is said there. 
> It can be that I have to change my approach of defining my « exercises », for instance by defining each exercise as a section or subsection? 
> Up to now I have two ways of defining an « exercise »: 
> 	• one is with \defineenumeration[Exo] (when using mkii), 
> 	• the other one is with \defineannotation[Exo] and your annotation module when using mkiv.
> 
> In neither case the command
> 	\setupreferencing[prefix=+]
> or
> 	\setupannotation[Exo][prefix=+]
> seems to generate local tags. 
> 
> Just in case, below is a minimal file, which shows how I use the annotation module.

There are a few fixes needed in the mechanism but as you can see below it works when you know what’s wrong
but to complete the function for MkIV Hans needs a shorter example.

\setupinteraction[state=start]

\usemodule[annotation]

\define[2]\ExoSetup
  {%doifsomething{\annotationparameter{prefix}}{\setupreferencing[prefix=\annotationparameter{prefix}]}%
   \doifsomething{\annotationparameter{prefix}}{\setupreferenceprefix[\annotationparameter{prefix}]}%
   \doifsomething{\annotationparameter{prefix}}{\setupformulas[referenceprefix=\annotationparameter{prefix}]}%
   \resetnumber[formula]
   \textrule{#1}%
   \startframedtext[width=\textwidth,frame=off,leftframe=on]%
   #2%
   \stopframedtext}
	 
\defineannotation
  [Exo]
  [alternative=command,
   command=\ExoSetup,
   text=Exercise ,
   number=yes,
   headcolor=darkred]

\starttext

\startExo[prefix=CharacTwo] Prove that if $ab=ba$ and $2ab=0$ then
\placeformula[eq:1]
\startformula
(a+b)^2 = a^2 + b^2.
\stopformula
Using the identity (\in[eq:1]) prove that $(a=b)^{2n} = a^{2n} + b^{2n}$.
\stopExo

\page

\startExo[prefix=Moivre]{Moivre's formula} Prove that for any integer $n$
\placeformula[eq:1]
\startformula
(\cos(x) + {\rm i}\sin(x))^n = \cos(nx) + {\rm i} \sin(nx).
\stopformula
Using the identity (\in[eq:1]) compute $\cos{3x}$.
\stopExo

\page

\starttabulate[|Tl|l|]
\NC eq:1           \NC \in{Equation}[eq:1]                                \NC\NR
\NC CharacTwo:eq:1 \NC \in{Equation}[CharacTwo eq:1]                      \NC\NR
\NC CharacTwo:eq:1 \NC \def\referenceprefix{CharacTwo}\in{Equation}[eq:1] \NC\NR
\NC Moivre:eq:1    \NC \in{Equation}[Moivre eq:1]                         \NC\NR
\NC Moivre:eq:1    \NC \def\referenceprefix{Moivre}\in{Equation}[eq:1]    \NC\NR
\stoptabulate

\stoptext

Wolfgang

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