Re: Draft version of document

[Sietse Brouwer <sbbrouwer@gmail.com>]

@Roger: I just realised I called you Robert. Sorry about that, moment
of inattention.

Hi Hans,

> Actually, this is something that should be doable with user data weren't it
> that for floats that's not yet available. So I've added it to the core (will
> be in next upload) ...

Ah, nifty; and fantastically quick, as always. I've not heard of
ConTeXt's "user data" feature before. Where can I find more on that?
Is there a list e-mail I should search for?

I'm trying to work out how to describe the new feature, so I can add
that to the documentation. I think I see two features, but I'm not
sure. Can you tell me if the below is correct?

New feature 1: previously we could only do
\startplacefigure[reference=fig:mill, title={A Mill}]
or
\startsection[reference=sec:sheep, title={The Sheep}]

but now we can do
\startplacefigure[reference=fig:mill, title={A Mill}][resource=mill]
or
\startsection[reference=sec:sheep, title={The Sheep}][mykey=myvalue]

Nothing is done with the parameters in the second key=value list, but
they are stored as part of the object when the object is written to
its figures/sections/whatever list; and there they can be used in
constructing the Table of figures/contents/whatever.

--------

New feature 2: the command
\rawstructurelistuservariable{#1}
. This command can be used by custom list entry macros like
\mylistentrymacro below:
\setuplist[somelist][alternative=command, command=\mylistentrymacro]

The command gets a property from the current list entry object, like so:
\rawstructurelistuservariable{resource} %--> mill

Question: does this work, too, or can we only access values in the
*second* key=value list?
\rawstructurelistuservariable{reference} %--> fig:mill

Cheers,
Sietse
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