first let me say: IT IS VERY DANGEROUS MODIFYING FDF
FILES THROUGH G FILES!  ok, now after that...

I'm pretty sure you can buy the user documentation
from Sherill-Lubinski.  You'll want the complete
document for SL-GMSDraw Dynamic Graphic Editor,
including info about the g files.

fdf files are proprietary to Foxboro (basically have a
funky header).  However, standard sl-gms files are
_very_ similar to fdf files. So I would not bring
Foxboro into your reasoning with SL, otherwise they
will point you to Foxboro.

If you are that interested in getting the
information...

off of <http://www.sl.com>
SL Corporation -- Corporate Headquarters 
240 Tamal Vista Boulevard 
Corte Madera, CA 94925  
USA 
415.927.1724 
415.927.8416 fax 
email contact: [EMAIL PROTECTED]

warning:  Even with the documentation is won't be an
easy feat to modify g files from fdf files.

I was also very interested in the g files.  The main
goal I wanted to accomplish was to change normal text
to rectangle (aka background) text.  [Funny thing
about not knowing whether you have bad connections or
not.]  Even when you know the pattern it's very
difficult.  The USER_DATA fields are incremented in a
specific manner.  Adding your own field is very
complicated.  Also positioning objects is complicated.
If you position it wrong, you could crash your whole
machine (ie put it too far off, and FoxView tries to
allocate too much memory).  

remember: IT IS VERY DANGEROUS MODIFYING FDF FILES
THROUGH G FILES!

good luck! 

--- Sascha Wildner <[EMAIL PROTECTED]> wrote:
> Hello,
> 
> I'll probably get a lot of no's here, but anyway:
> 
> Does anyone here have information about the details
> of the GML language used in the .g files (aka
> FoxView display dumps) produced with
> /usr/fox/wp/bin/tools/fdf_g or
> /usr/fox/wp/bin/tools/m1g?  When I called
> Sherill-Lubinski asking for a language description
> or something like that their reaction was rather
> cool redirecting me to Foxboro as the vendor of
> their product.
> 
> From what it looks it's a general description
> language for graphics with the Foxboro specific
> stuff coded into the userdata fields.
> 
> In my opinion it would be very nice to have some
> sort of language description.  Does anyone know if
> such a document (or better yet, a BNF grammar)
> exists?
> 
> 
> Sascha Wildner
> erpicon Software Development GmbH
> 
> 


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