I'd like to mention that none of the proposed formats except the XML approach would be capable of supporting the stuff we want to add to GIMP with GEGL.
Well, that pretty much settles that discussion...
So let's start talking XML + archive again, shall we ;).
According the library that reads and writes the new format, GEGL should provide this functionality.
Requiring an application to incorporate all of GEGL in order to read/write an XCF file is, in my opinion, a recipe for it not getting used by other applications. (and I say this as one of those other application developers).
Leonard -- --------------------------------------------------------------------------- Leonard Rosenthol <mailto:leonardr@xxxxxxxxxxxxx> <http://www.lazerware.com>