{"action":"created","comment":{"url":"https://api.github.com/repos/mediachain/mediachain/pulls/comments/65453534","id":65453534,"diff_hunk":"@@ -14,15 +14,22 @@ We will also outline a roadmap toward improved, `Future` Indexer generations. Fu\n \n ## Terminology\n \n-Relevant Mediachain terminology background for this RFC. See RFC-1[2] and RFC-2[3] for more information.\n+Relevant Mediachain terminology background for this RFC. See also RFC-1[2] and RFC-2[3] for more information.\n \n - `Indexer` - Collection of Mediachain subsystems described in this RFC.\n - `Datastore` - Persistent content-addressed storage system, used to store Mediachain media and blocks. Currently IPFS[4].\n - `Journal` - Flattened and partially-reconciled view of the Mediachain knowledge base. Maintained by `Transactors`.\n - `Folding` - Producing a single flattened representation of a chain of updates, reconciling any conflicts and discarding bad information in the process.\n - `Clients` - Embedded API or external nodes, which are the interface for end-user nodes to receive a stream of updates to the `Journal` from `Transactor` nodes, and for communicating writes to the `Transactors`. They also conduct reads and writes to the `Datastore`.\n - `Transactors` - Core of Mediachain. Accepts writes to the `Journal` from `Clients`, serves `Clients` with views of the `Journal`, and records transactions on their behalf. (Referred to as `Peer Nodes` in RFC-2.)\n-- `Media Identifier` - One of several types of strings that can be used to indicate the identity of a media work. Most Indexer subsystems will resolve this identifier into a canonical ID. See more in the `Media Identifiers` section.\n+- `Media Identifier` - String used to identify a media work. The string's prefix determines which, of several possible identifier types, each string is. See the `Media Identifiers` section in this RFC.\n+- `Artefact` - Media work tracked by Mediachain. Identified in the blockchain by its latest `Canonical ID`.\n+- `Entity` - Persona or organization who may associate with `Artefacts`. Identified in the blockchain by its latest `Canonical ID`.\n+- `Canonical` -  Serialized blockchain block, stored in IPFS and identified by a `Canonical ID`.\n+- `Canonical ID` - IPFS ID of a serialized blockchain block. In addition to identifying blockchain blocks, also used by blockchain to identify `Entities` and `Artifacts`. The current `Canonical IDs` of an `Entity` or `Artefact` can change over time, when its metadata is updated in the blockchain or when it is merged with another `Entity` or `Artefact`.","path":"rfc/mediachain-rfc-3.md","position":18,"original_position":18,"commit_id":"b393d5ccbb41028fef2921181da0c11a4437622f","original_commit_id":"b393d5ccbb41028fef2921181da0c11a4437622f","user":{"login":"parkan","id":204986,"avatar_url":"https://avatars.githubusercontent.com/u/204986?v=3","gravatar_id":"","url":"https://api.github.com/users/parkan","html_url":"https://github.com/parkan","followers_url":"https://api.github.com/users/parkan/followers","following_url":"https://api.github.com/users/parkan/following{/other_user}","gists_url":"https://api.github.com/users/parkan/gists{/gist_id}","starred_url":"https://api.github.com/users/parkan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/parkan/subscriptions","organizations_url":"https://api.github.com/users/parkan/orgs","repos_url":"https://api.github.com/users/parkan/repos","events_url":"https://api.github.com/users/parkan/events{/privacy}","received_events_url":"https://api.github.com/users/parkan/received_events","type":"User","site_admin":false},"body":"I don't think the Canonical and Canonical ID definitions are right--we've usually spoken of a \"canonical\" as the UUID-like identifier given to our \"idea\" of a work of art to which all data about it and its \"instances\" (copies, appearances in media, etc) refer to, and the \"canonical id\" as that identifier. In the current version, I **think** the correct analogy is the `Artefact`/`Entity` MultiHash id (which is pointed to by `ref` in an `ArtefactCreationCell` etc) but we should clear this up.","created_at":"2016-06-01T22:18:34Z","updated_at":"2016-06-01T22:18:34Z","html_url":"https://github.com/mediachain/mediachain/pull/109#discussion_r65453534","pull_request_url":"https://api.github.com/repos/mediachain/mediachain/pulls/109","_links":{"self":{"href":"https://api.github.com/repos/mediachain/mediachain/pulls/comments/65453534"},"html":{"href":"https://github.com/mediachain/mediachain/pull/109#discussion_r65453534"},"pull_request":{"href":"https://api.github.com/repos/mediachain/mediachain/pulls/109"}}},"pull_request":{"url":"https://api.github.com/repos/mediachain/mediachain/pulls/109","id":72193384,"html_url":"https://github.com/mediachain/mediachain/pull/109","diff_url":"https://github.com/mediachain/mediachain/pull/109.diff","patch_url":"https://github.com/mediachain/mediachain/pull/109.patch","issue_url":"https://api.github.com/repos/mediachain/mediachain/issues/109","number":109,"state":"open","locked":false,"title":"RFC-3","user":{"login":"autoencoder","id":19392619,"avatar_url":"https://avatars.githubusercontent.com/u/19392619?v=3","gravatar_id":"","url":"https://api.github.com/users/autoencoder","html_url":"https://github.com/autoencoder","followers_url":"https://api.github.com/users/autoencoder/followers","following_url":"https://api.github.com/users/autoencoder/following{/other_user}","gists_url":"https://api.github.com/users/autoencoder/gists{/gist_id}","starred_url":"https://api.github.com/users/autoencoder/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/autoencoder/subscriptions","organizations_url":"https://api.github.com/users/autoencoder/orgs","repos_url":"https://api.github.com/users/autoencoder/repos","events_url":"https://api.github.com/users/autoencoder/events{/privacy}","received_events_url":"https://api.github.com/users/autoencoder/received_events","type":"User","site_admin":false},"body":"Putting up a draft for discussion. Don't have to merge (yet.)\r\n\r\n- Is the glossary correct?\r\n- Should we move the glossary to a separate 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