{"action":"created","issue":{"url":"https://api.github.com/repos/bjornbm/dimensional-dk/issues/49","labels_url":"https://api.github.com/repos/bjornbm/dimensional-dk/issues/49/labels{/name}","comments_url":"https://api.github.com/repos/bjornbm/dimensional-dk/issues/49/comments","events_url":"https://api.github.com/repos/bjornbm/dimensional-dk/issues/49/events","html_url":"https://github.com/bjornbm/dimensional-dk/issues/49","id":68831502,"number":49,"title":"Are negative units allowed?","user":{"login":"dmcclean","id":603347,"avatar_url":"https://avatars.githubusercontent.com/u/603347?v=3","gravatar_id":"","url":"https://api.github.com/users/dmcclean","html_url":"https://github.com/dmcclean","followers_url":"https://api.github.com/users/dmcclean/followers","following_url":"https://api.github.com/users/dmcclean/following{/other_user}","gists_url":"https://api.github.com/users/dmcclean/gists{/gist_id}","starred_url":"https://api.github.com/users/dmcclean/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dmcclean/subscriptions","organizations_url":"https://api.github.com/users/dmcclean/orgs","repos_url":"https://api.github.com/users/dmcclean/repos","events_url":"https://api.github.com/users/dmcclean/events{/privacy}","received_events_url":"https://api.github.com/users/dmcclean/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-04-16T02:44:56Z","updated_at":"2015-04-16T02:52:10Z","closed_at":null,"body":"Is there any sense to allowing negative units, e.g. definitions of the following form:\r\n\r\n````\r\nnegawatt :: Unit DEnergy\r\nnegawatt = prefix (-1) (mega watt)\r\n````\r\n\r\nI don't believe there is. I am contemplating a change that would make it less fully supported, and I'm wondering if perhaps it should be banned outright as unexpected and a potential trap.\r\n\r\nAFAICS, the NIST Guide doesn't have anything to say about this. The UCUM disallows it, see http://unitsofmeasure.org/ucum.html#section-Syntax-Rules."},"comment":{"url":"https://api.github.com/repos/bjornbm/dimensional-dk/issues/comments/93623582","html_url":"https://github.com/bjornbm/dimensional-dk/issues/49#issuecomment-93623582","issue_url":"https://api.github.com/repos/bjornbm/dimensional-dk/issues/49","id":93623582,"user":{"login":"dmcclean","id":603347,"avatar_url":"https://avatars.githubusercontent.com/u/603347?v=3","gravatar_id":"","url":"https://api.github.com/users/dmcclean","html_url":"https://github.com/dmcclean","followers_url":"https://api.github.com/users/dmcclean/followers","following_url":"https://api.github.com/users/dmcclean/following{/other_user}","gists_url":"https://api.github.com/users/dmcclean/gists{/gist_id}","starred_url":"https://api.github.com/users/dmcclean/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dmcclean/subscriptions","organizations_url":"https://api.github.com/users/dmcclean/orgs","repos_url":"https://api.github.com/users/dmcclean/repos","events_url":"https://api.github.com/users/dmcclean/events{/privacy}","received_events_url":"https://api.github.com/users/dmcclean/received_events","type":"User","site_admin":false},"created_at":"2015-04-16T02:52:10Z","updated_at":"2015-04-16T02:52:10Z","body":"To be clear, this is fully supported right now with no problems that I can see. It does exactly what you would expect it to do, provided you would expect it to do something."}}