Dear list,

the attached .tex file is the minimal working example we discussed today in the 
online meeting.
I realized that the approach of looping through k of p[k] is not fitting my 
needs, because it's not flexible enough.
I need another approach, one which works with layer sets.
I would stop using p as an array, because with the layer sets approach we don't 
have a fixed order of the layers.
So the definition of the layers would be something like
picture layerA;
layerA:=image(
label("Word 1", z1);
);

picture layerW;
layerW:=image(
label("Mot 2", z2);
);

picture layerM;
layerM:=image(
label("Parola 3", z3);
);

picture layerC;
layerC:=image(
label("Wort 4", z3+z1);
);

picture layerY;
layerY:=image(
label("Nummer 5", z2+z3);
);

picture layerU;
layerU:=image(
label("number 6", z2+z1);
);

After that, I would define layer sets and layer subsets. This will be done 
manually for each layer set and each layer subset.
I don't know the proper syntax to do that. Let's assume we could use a variable 
type called "myset".

myset layersubsetGamma;
layersubsetGamma:={layerU,layerM};

In my logic, the layers will be drawn in the order of their appearance within 
the {}. In the example, drawn content of layerM might cover drawn content of 
layerU.
Contrary to a layer subset, each layer set will result in a PDF page, and thus 
the layer sets are related to each other by an inner order. That's why I would 
use an array variable here with [].
I don't know how to append a set. In the following example, I assumed there 
would be a function myappend(<initial set>, <the things what the initial set 
should be appended with>)
myset layerset[];
layerset1 := {layerW,layerA};
layerset2 := myappend{layerset1, layerY};
layerset3 := myappend{layerset2, layersubsetGamma};
layerset4 := myappend{layerset2, layerU};
layerset5 := myappend{layerset4, layersubsetGamma};

Finally, I would need each layerset[k] typeset on its own pdf page. And of 
course on each page k, only the layers which appear in the definition of the 
layerset[k] should be drawn on top of each other in the order as they appear in 
that definition.
I'm very curious to hear your suggestions.
Thanks
Emanuel

Attachment: multipage_metapost_mwe-very_simple.tex
Description: TeX document

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