Many thanks for the enlightening answers.
The explanations about xml solved question 1 and \startmatrix\stopmatrix
solved question 4.
I'm now crunching xml input and handling it half in lua and half in tex
(and I'm verry happy about it).
I'm still struggling with a few points though (with context standalone
beta on ubuntu):
3) I'm flowing text around mathematical text with graphic ornaments
(overlay) but the bounding box from metapost (red) and from TeX (black)
on the following minimal example aren't the same which produce all kinds
of "flowing text" issues.
is there a way/an option for framedtexts with overlay to get the max
width/height size of the main content + overlays ?
\startusableMPgraphic{myFrame}
numeric o, l, m ; path a, b ; pair c ;
picture d; d = textext.rt(\MPstring{Content}) ;
draw (unitsquare xyscaled (OverlayWidth,OverlayHeight) shifted
(-OverlayWidth/2,-OverlayHeight/2)) withpen pencircle scaled 1pt
withcolor green;
draw (d enlarged 2cm) withcolor red withpen pencircle scaled 2pt;
draw boundingbox currentpicture withpen pencircle scaled .1mm dashed
evenly withcolor blue ;
\stopusableMPgraphic
\defineoverlay[myOverlay][\useMPgraphic{myFrame}]
\defineframedtext[myStatement][frame=off]
\setupframedtexts[myStatement][backgroundcolor=lightgray,background=myOverlay,width=\textwidth,autowidth=force]
\starttext
\framed[fit]{\startmyStatement
TEST
\stopmyStatement}
\stoptext
3b) I found a dirty workaround by making metapost draw the texts and the
graphics (through mpstring) but then, i can't embed graphics in my
Tex-text.
Is there a way to have graphics inside MPstrings that goes inside metapost ?
About question 2, Context doesn't produce svg okey...but tikz and
metapost can produce svg.
So, is there a ConteXt setup/systems calls/a (simple or not) workaround
to make metapost/tikz produce svg files ?
Like some script that I could run on my snipets ?
I would really like to produce svg from my metapost/tikz pictures
Best regards,
Olivier
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