Re: [Groff] Signaling diagrams?

[Larry Kollar]

Ted Harding wrote:

> > > > Is there a program to generate signdling diagrams out there? I
> > > > sure could use one right now
> > >
> > > What kind of signaling diagrams?  Trains, cells, ...?  For some
> > > applications, I've found Graphviz makes an excellent front end to
> > > pic (or you can generate ps, etc. directly).
> >
> > Telephony signaling or provisioning flows. RFC3261 has some examples
> > (the first on page 12). A more complex example, pretty much as big as
> > anything I'd have to deal with, is on page 30 of http://
> > www.cablelabs.com/specifications/PKT-SP-PROV1.5-I03-070412.pdf
> Is this the diagram labelled
>
> Figure 6. Embedded-MTA Secure Power-on Initialization Flow (IPv4 eCM)?
>
> In what format are the data specifying the components of the diagram
> provided?

That's the one. The format can be pretty much anything — something  
fairly easy to maintain would be preferable.

> Despite appearances (which might suggest thinking of 'pic') I think,
> on the face of it, that it looks like a job that 'tbl' could handle
> nicely, with a certain amount of "magic".
>
> However, to get to that poiint (or with 'pic', in fact) I think the
> data file should be filtered through (say) a suitable 'awk' program
> to generate code that would produce the desired result. This would
> depend on how the original data are presented.

Pic might be better… it can manage arrows. So a preprocessor to pic  
sounds like the way to go?

-- Larry