Nick Bogarty from the International Digital Publishing Forum (IDPF) writes that the Open Publication Structure (OPS) 2.0 has been elevated for IDPF Member and Public Review. The review period will begin today and extend for 30 days ending on Wednesday, May 16th, 2007. The IDPF strongly encourages feedback from potential users, developers and others, whether IDPF members or not, for the sake of improving the interoperability and quality of IDPF work.
You can view the draft document here. Feedback on the draft specifications should be made by posting a reply to the forum topic, and sample OPS 2.0 files can be found for download here.