In most areas of drawing practice BS 8888 is the one to go for - it is a guide to the ISO standards covering product documentation. Though it does give the relevant ISO standard numbers, it is much more of a standalone document (albeit a big one !) . It's usually much easier to digest a section of that, than the separate ISO standards. In this case though it's a bit of a 'techno-babble' topic ( I certainly don't follow it at first reading ).
Check you local Library service for free on-line access to BSI standards. That's great if you just need to check something, or refer occasionally. Lack of funding has forced some Library services to drop their subscriptions to the BSI service, and others have tightened the criteria for joining. I had to switch Library provider a while back, but now have access again from my office.