anchor.diff:  the identity is independent of the container id.
   
   A global subscription identity is indicated by adding the symbol
  -'global' to the capabilities for the source.
  +\'global\' to the capabilities for the source.
   
   A subscription may be shared by more than one consuming link. In this
   case, the messages for the subscription are distributed between all
  
positive.code: subscription over connections with the same container id, we propose a
  scheme by which such links can be disambiguated while retaining their
  ability to identify the same subscription. In this scheme, only the
  part of the link name up to (but excluding) the '|' character is used
  for establishing the idenity of the subscription the link refers
  to. E.g. the link names mysub|foo and mysub|bar would both be
  interpreted as referencing the subscription named 'mysub' (which could
  
negative.code: [1] A link name may have a special suffix added to ensure uniqueness
  for a given container-id(/connection) without altering the subscription it
  identifies. For the purposes of identifying a subscription, anything after
  and including a \'|\' character in the link name is ignored.
  
  Code Snippets
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