{"action":"created","issue":{"url":"https://api.github.com/repos/streamreasoning/RSP-QL/issues/28","repository_url":"https://api.github.com/repos/streamreasoning/RSP-QL","labels_url":"https://api.github.com/repos/streamreasoning/RSP-QL/issues/28/labels{/name}","comments_url":"https://api.github.com/repos/streamreasoning/RSP-QL/issues/28/comments","events_url":"https://api.github.com/repos/streamreasoning/RSP-QL/issues/28/events","html_url":"https://github.com/streamreasoning/RSP-QL/issues/28","id":131211304,"number":28,"title":"Clarify Definition of Timestamped Graph Re Multiplicity of Timestamp Triples","user":{"login":"greenTara","id":1248341,"avatar_url":"https://avatars.githubusercontent.com/u/1248341?v=3","gravatar_id":"","url":"https://api.github.com/users/greenTara","html_url":"https://github.com/greenTara","followers_url":"https://api.github.com/users/greenTara/followers","following_url":"https://api.github.com/users/greenTara/following{/other_user}","gists_url":"https://api.github.com/users/greenTara/gists{/gist_id}","starred_url":"https://api.github.com/users/greenTara/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/greenTara/subscriptions","organizations_url":"https://api.github.com/users/greenTara/orgs","repos_url":"https://api.github.com/users/greenTara/repos","events_url":"https://api.github.com/users/greenTara/events{/privacy}","received_events_url":"https://api.github.com/users/greenTara/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/streamreasoning/RSP-QL/labels/bug","name":"bug","color":"fc2929"}],"state":"open","locked":false,"assignee":null,"milestone":{"url":"https://api.github.com/repos/streamreasoning/RSP-QL/milestones/1","html_url":"https://github.com/streamreasoning/RSP-QL/milestones/Abstract%20Syntax%20and%20Semantics%20Document","labels_url":"https://api.github.com/repos/streamreasoning/RSP-QL/milestones/1/labels","id":1561725,"number":1,"title":"Abstract Syntax and Semantics Document","description":"The HTML source is managed at https://github.com/streamreasoning/RSP-QL/blob/gh-pages/Abstract%20Syntax%20and%20Semantics%20Document/index.html\r\nand published at\r\nhttp://streamreasoning.github.io/RSP-QL/Abstract%20Syntax%20and%20Semantics%20Document/","creator":{"login":"greenTara","id":1248341,"avatar_url":"https://avatars.githubusercontent.com/u/1248341?v=3","gravatar_id":"","url":"https://api.github.com/users/greenTara","html_url":"https://github.com/greenTara","followers_url":"https://api.github.com/users/greenTara/followers","following_url":"https://api.github.com/users/greenTara/following{/other_user}","gists_url":"https://api.github.com/users/greenTara/gists{/gist_id}","starred_url":"https://api.github.com/users/greenTara/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/greenTara/subscriptions","organizations_url":"https://api.github.com/users/greenTara/orgs","repos_url":"https://api.github.com/users/greenTara/repos","events_url":"https://api.github.com/users/greenTara/events{/privacy}","received_events_url":"https://api.github.com/users/greenTara/received_events","type":"User","site_admin":false},"open_issues":16,"closed_issues":0,"state":"open","created_at":"2016-02-03T19:02:47Z","updated_at":"2016-02-10T00:55:19Z","due_on":null,"closed_at":null},"comments":3,"created_at":"2016-02-04T01:35:55Z","updated_at":"2016-02-10T01:26:37Z","closed_at":null,"body":"The definition has the word \"single\" with a strike-out.\r\nAll further developments of the RDF stream have a single timestamp triple as the default graph in the RDF Dataset that is a timestamped graph.\r\n\r\nTherefore, we need to either accept that a timestamped graph has this restricted structure, or modify RDF streams to accommodate timestamped graphs with multiple triples in their default graph.\r\n\r\nNote that the definition of RDF stream allows the same named graph (n, g) to be used in multiple items in the stream, so it is possible to assign multiple timestamps to the same named graph within an RDF stream\r\n(n, g) (g p1 t1)\r\n(n, g) (g p2 t2)\r\n\r\nIf it is desired to transmit nontemporal metadata of the named graphs as part of an RDF stream, then this must be handled by another mechanism (if the default graph is restricted to just the timestamp triple).\r\nHere is one option: timestamp the metadata and add it to the stream:\r\n (n, g) (n p1 t1)\r\n(n, g) (n p2 t2)\r\n(m, h) (m p3 t3)\r\nwhere h contains metadata about g, e.g. (n r x) where x is not a temporal entity."},"comment":{"url":"https://api.github.com/repos/streamreasoning/RSP-QL/issues/comments/182159551","html_url":"https://github.com/streamreasoning/RSP-QL/issues/28#issuecomment-182159551","issue_url":"https://api.github.com/repos/streamreasoning/RSP-QL/issues/28","id":182159551,"user":{"login":"greenTara","id":1248341,"avatar_url":"https://avatars.githubusercontent.com/u/1248341?v=3","gravatar_id":"","url":"https://api.github.com/users/greenTara","html_url":"https://github.com/greenTara","followers_url":"https://api.github.com/users/greenTara/followers","following_url":"https://api.github.com/users/greenTara/following{/other_user}","gists_url":"https://api.github.com/users/greenTara/gists{/gist_id}","starred_url":"https://api.github.com/users/greenTara/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/greenTara/subscriptions","organizations_url":"https://api.github.com/users/greenTara/orgs","repos_url":"https://api.github.com/users/greenTara/repos","events_url":"https://api.github.com/users/greenTara/events{/privacy}","received_events_url":"https://api.github.com/users/greenTara/received_events","type":"User","site_admin":false},"created_at":"2016-02-10T01:26:37Z","updated_at":"2016-02-10T01:26:37Z","body":"I have managed to write the definitions for things like isomorphism and stream merge/union so that it doesn't matter if there is more than one triple in the default graph of a timestamped graph, as long as there is only one that is designated as the timestamp triple. It should be possible also with the semantics. So I think this clears the way to allow multiple triples in the default graph of a timestamped graph."}}