[PD-dev] PD patches in XML

Thomas Grill gr at grrrr.org
Fri Dec 10 11:05:34 CET 2004

something like GUIDs would be great, but i think they should be somehow
readable (not Microsoft-like).
What about a running index per patcher, that is incremented every time an
object is created?
Or a date/time/microtime combination?
For me the integration into the PD file format is not important since
there's no real place for other metadata either.
A discussion about a general XML format is really appreciated.

best greetings,

----- Original Message ----- 
From: "Mathieu Bouchard" <matju at sympatico.ca>
To: "Martin Peach" <martinrp at vax2.concordia.ca>
Cc: "Georg Holzmann" <grhPD at gmx.at>; <pd-dev at iem.at>
Sent: Friday, December 10, 2004 10:48 AM
Subject: Re: [PD-dev] PD patches in XML

> On Thu, 9 Dec 2004, Martin Peach wrote:
> > Mathieu Bouchard wrote:
> > > problem is that object ID's change too often, because if an object is
> > > deleted, its ID is not skipped, and a bunch of objects are renumbered
> > > so that the ID is not skipped, because there is no way in the format
> > > skip one. I think this has to be solved in the pd internals first, in
> > > runtime storage of a patch, because it's where the renumbering (or the
> > > ignoring of numbering) normally happens.
> > This might be a good time to introduce the Globally Unique Identifer,
> > perhaps in the form of a 32-bit random number that is generated for each
> > object in a patch and never reused -- the running pd program would
> > maintain a list of all GUIDs in use in the current session.
> Well, I was thinking of something along the lines of a locally unique
> identifier, whose scope is exactly one patcher, because the problem with
> changing indices happens exactly at the patcher level. I don't know what
> GUID's would bring at this point. I can't think of any nice way of
> introducing GUID's easily in the .pd format except by making each object
> two lines of code instead of one. What do you have in mind?
> _____________________________________________________________________
> Mathieu Bouchard -=- Montréal QC Canada -=- http://artengine.ca/matju
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