Re: Normative figures

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On Mon, Jan 09, 2006 at 07:46:42PM +0000,
 Stewart Bryant <stbryant@xxxxxxxxx> wrote 
 a message of 73 lines which said:

> For example you could say the following in text : [long and
> complicated example deleted]

For such examples (do note that your example is an illustration of a
point and therefore does not need to be normative, like, say, a state
diagram), graph people produced several languages which are
non-ambiguous, expressed as ASCII and produce nice output. Some even
are free (as in free speech and as in free beer). (Unfortunately, none
is "standard" in any way, AFAIK.)

The one I recommend is Graphviz
(http://www.research.att.com/sw/tools/graphviz/). An example of
Graphviz code for a real network:

http://www.seekingfire.com/projects/metanetwork/maps/meta.dot

(See http://www.seekingfire.com/projects/metanetwork/info.html for the
context)

See also:

"Managing IP Networks with Free Software"
http://www.nanog.org/mtg-0210/ppt/stephen.pdf has a chapter about
Graphviz

"A Systematic Approach to BGP Configuration Checking"
http://www.nanog.org/mtg-0310/pdf/feamster.pdf uses cflow to produce
Graphviz ".dot" files.

(ACL compilers like Netspoc http://netspoc.berlios.de/ also have an
ASCII language to represent networks.)

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