[cad-linux] Re: An open CAD file format
- From: Massimiliano Mirra <mmirra@xxxxxxxxx>
- To: cad-linux@xxxxxxxxxxxxx
- Date: Sun, 07 Sep 2003 10:34:29 +0200
Bakul Shah <bakul@xxxxxxxxxxxxx> writes:
> At least until the development of an open CAD program gets to
> a self-sustaining stage I'd use s-expressions to represent
> data. Here is a somewhat restricted definition:
>
> An s-expr is a list of atoms or s-exprs where the first
> element of the list defines the meaning of the whole
> s-expr. An atom is a number, string or symbol. An s-expr
> is written by enclosing its elements in parentheses.
As an Elisper rookie and a Scheme lover, I can share your attitude
towards sexp's. There's only one thing that kept me from jumping on
them for the geometry format (except the fact that I was mostly
exploring the higher level concepts): about all common text editing
tools are line-oriented. I wrote in a previous message that you
cannot grep through a db; you also cannot grep through a sexp (well
you can, it just won't be very useful). This doesn't mean I am
putting aside either; only that I have some more thinking ahead before
I can give them a try. :-)
Massimiliano
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