{"action":"created","issue":{"url":"https://api.github.com/repos/tbeu/Modelica/issues/712","repository_url":"https://api.github.com/repos/tbeu/Modelica","labels_url":"https://api.github.com/repos/tbeu/Modelica/issues/712/labels{/name}","comments_url":"https://api.github.com/repos/tbeu/Modelica/issues/712/comments","events_url":"https://api.github.com/repos/tbeu/Modelica/issues/712/events","html_url":"https://github.com/tbeu/Modelica/issues/712","id":184722050,"number":712,"title":"Revise/revisit all SI-units listed in `Modelica.SIunits`","user":{"login":"modelica-trac-importer","id":22202507,"avatar_url":"https://avatars.githubusercontent.com/u/22202507?v=3","gravatar_id":"","url":"https://api.github.com/users/modelica-trac-importer","html_url":"https://github.com/modelica-trac-importer","followers_url":"https://api.github.com/users/modelica-trac-importer/followers","following_url":"https://api.github.com/users/modelica-trac-importer/following{/other_user}","gists_url":"https://api.github.com/users/modelica-trac-importer/gists{/gist_id}","starred_url":"https://api.github.com/users/modelica-trac-importer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/modelica-trac-importer/subscriptions","organizations_url":"https://api.github.com/users/modelica-trac-importer/orgs","repos_url":"https://api.github.com/users/modelica-trac-importer/repos","events_url":"https://api.github.com/users/modelica-trac-importer/events{/privacy}","received_events_url":"https://api.github.com/users/modelica-trac-importer/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/tbeu/Modelica/labels/P:%20normal","name":"P: normal","color":"aa8888"},{"url":"https://api.github.com/repos/tbeu/Modelica/labels/SIunits","name":"SIunits","color":"0000aa"},{"url":"https://api.github.com/repos/tbeu/Modelica/labels/task","name":"task","color":"cccccc"}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":6,"created_at":"2016-10-23T22:58:47Z","updated_at":"2016-10-23T22:59:47Z","closed_at":null,"body":"**Reported by dietmarw on 12 Mar 2012 12:10 UTC**\nThe current version of `Modelica.SIunits` is based on quote\r\n\r\n> Library of type and unit definitions based on SI units according to ISO 31-1992\r\n\r\nThe problem is that this ISO norm is deprecated by [ ISO 80000-1:2009](http://www.iso.org/iso/iso_catalogue/catalogue_ics/catalogue_detail_ics.htm?csnumber=30669). \r\n\r\nIn addition to that has the current `Modelica.SIunts` been steadily \"enhanced\" by other library officers with unit names that are not defined in the ISO norm but where just ''convenient'' to use. There should be a proper rule on what can be added and what not.\r\n\r\nRelated tickets: #545 (Molar units missing), #688 (Add Complex Units (Magnetic))\r\n\r\nI'm scheduling this already for [so that we can evaluate the new units that have been added recently. The main overhaul should probably be done in connection with [milestone:MSL4.0](milestone:MSL3.2.1])\r\n\r\nRelated tickets: #545 (Molar units missing), #688 (Add Complex Units (Magnetic))\r\n\r\n\n\nMigrated-From: https://trac.modelica.org/Modelica/ticket/712"},"comment":{"url":"https://api.github.com/repos/tbeu/Modelica/issues/comments/255620906","html_url":"https://github.com/tbeu/Modelica/issues/712#issuecomment-255620906","issue_url":"https://api.github.com/repos/tbeu/Modelica/issues/712","id":255620906,"user":{"login":"modelica-trac-importer","id":22202507,"avatar_url":"https://avatars.githubusercontent.com/u/22202507?v=3","gravatar_id":"","url":"https://api.github.com/users/modelica-trac-importer","html_url":"https://github.com/modelica-trac-importer","followers_url":"https://api.github.com/users/modelica-trac-importer/followers","following_url":"https://api.github.com/users/modelica-trac-importer/following{/other_user}","gists_url":"https://api.github.com/users/modelica-trac-importer/gists{/gist_id}","starred_url":"https://api.github.com/users/modelica-trac-importer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/modelica-trac-importer/subscriptions","organizations_url":"https://api.github.com/users/modelica-trac-importer/orgs","repos_url":"https://api.github.com/users/modelica-trac-importer/repos","events_url":"https://api.github.com/users/modelica-trac-importer/events{/privacy}","received_events_url":"https://api.github.com/users/modelica-trac-importer/received_events","type":"User","site_admin":false},"created_at":"2016-10-23T22:59:47Z","updated_at":"2016-10-23T22:59:47Z","body":"**Comment by mtiller on 18 Apr 2012 09:43 UTC**\nThis idea of per-library Units packages is interesting.  But I don't think it is very practical.  We will end up importing lots of package contents from different places and we'll still have a lot of left over units that have to go somewhere (since I think we should include at least the ISO standard units, esoteric as they may be).\r\n\r\nHowever, you raise an interesting point about the nominal values.  I think perhaps a good compromise might be to put everything in Modelica.SIunits but then create per library units packages for that library to use where domain specific attributes (min, max, start, nominal) could all be associated with it.  Then the library could extend from that type.\r\n\r\nThis would achieve the objective of having domain specific units used within the library while still preserving the aggregated units package.\r\n"}}
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