IEC SC 65C Published 5,000+ Pages of New Fieldbus Editions (IEC 61158)

IEC SC 65C (subcommittee 65C: Industrial networks, of IEC technical committee 65: Industrial-process measurement, control and automation) has published 5,000+ pages with the following documents available for PUBLIC comments (http://www.iec.ch/comment):

1. 65C/864A/CDV (77 pages)
   IEC 61158-1 ED2: Industrial communication networks - Fieldbus specifications - Part 1: Overview and guidance for the IEC 61158 and IEC 61784 series
2. 65C/865A/CDV (219 pages)
   IEC 61158-3-X ED4: Industrial communication networks - Fieldbus specifications - Part 3 - X: Data-link layer service definition - Type X elements
3. 65C/866A/CDV (1,445 pages)
   IEC 61158-4-X ED4: Industrial communication networks - Fieldbus specifications - Part 4 - X: Data-link layer protocol specification - Type x elements
4. 65C/867A/CDV (1,721 pages)
   IEC 61158-5-X ED4: Industrial communication networks - Fieldbus specifications - Part 5-X: Application layer service definition - Type X elements
5. 65C/868A/CDV (2,205 pages)
   IEC 61158-6-X ED4: Industrial communication networks - Fieldbus specifications - Part 6-X: Application layer protocol specification - Type X elements
6. 65C/869/CDV
   IEC 61918 ED4: Industrial communication networks - Installation of communication networks in industrial premises 

There are many other documents that are part of this standard series.
Take your time to comment on these documents.

What's about interoperability? Read what part 1 says in clause 4.2:

"Most of the fieldbus types specified in the IEC 61158 series include a range of selectable and configurable options within their detailed specifications. In general, only certain restricted combinations of options will interwork or interoperate correctly."

It seems like an April fool' s joke - BUT, NO, IT IS REALLY TRUE.