{"action":"opened","issue":{"url":"https://api.github.com/repos/sdmx-twg/sdmx-rest/issues/28","labels_url":"https://api.github.com/repos/sdmx-twg/sdmx-rest/issues/28/labels{/name}","comments_url":"https://api.github.com/repos/sdmx-twg/sdmx-rest/issues/28/comments","events_url":"https://api.github.com/repos/sdmx-twg/sdmx-rest/issues/28/events","html_url":"https://github.com/sdmx-twg/sdmx-rest/issues/28","id":98336131,"number":28,"title":"Add an option to get data as they were at a certain point in time","user":{"login":"sosna","id":1846109,"avatar_url":"https://avatars.githubusercontent.com/u/1846109?v=3","gravatar_id":"","url":"https://api.github.com/users/sosna","html_url":"https://github.com/sosna","followers_url":"https://api.github.com/users/sosna/followers","following_url":"https://api.github.com/users/sosna/following{/other_user}","gists_url":"https://api.github.com/users/sosna/gists{/gist_id}","starred_url":"https://api.github.com/users/sosna/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sosna/subscriptions","organizations_url":"https://api.github.com/users/sosna/orgs","repos_url":"https://api.github.com/users/sosna/repos","events_url":"https://api.github.com/users/sosna/events{/privacy}","received_events_url":"https://api.github.com/users/sosna/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/sdmx-twg/sdmx-rest/labels/new%20feature","name":"new feature","color":"009800"},{"url":"https://api.github.com/repos/sdmx-twg/sdmx-rest/labels/normal","name":"normal","color":"eb6420"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-07-31T07:54:38Z","updated_at":"2015-07-31T07:54:38Z","closed_at":null,"body":"The SDMX 2.1 RESTful web services currently allows to:\r\n- Get the data matching a query;\r\n- Get the data matching a query **if** it has changed since a certain point in time (using the `HTTP If-Modified-Since header`);\r\n- Get what has changed since a certain point in time (using the `updatedAfter` parameter);\r\n- Get the full history of how data evolved over time (using the `includeHistory` parameter).\r\n\r\nHowever, it does not offer a direct way to get the data as they were at a certain point in time (there is an indirect way, using the `includeHistory` parameter but the work is then left to the client). \r\n\r\nA new parameter (e.g. `snapshot`) could be added, where a timestamp can be supplied and the web service would then return the data matching the query as they were at that point in time (for example, as they were when a report was published)."}}