__id field for unique identifiers

At a glance

• Identifier: #232
• Stage: RFCX: Closed 2017-01-16T18:11:44Z
• Champion: @stubailo
• PR: __id field for unique identifiers

Timeline

• Commit pushed: Remove .vscode from gitignore on 2016-10-31 by Sashko Stubailo
• Spec PR created on 2016-10-29 by stubailo
• 2 commits pushed on 2016-10-28:
  • Add RFC sketch for __id for discussion by Sashko Stubailo
  • Add some extra points by Sashko Stubailo

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This brings together many of the considerations about a __id unique identifier field into one document. There is still a lot of work to do before this becomes a merge-able diff on the spec:

• Agree on field semantics specified in this PR
• Restructure the spec so that the description for __id can live next to __typename
• Write the change to the spec