{"action":"closed","issue":{"url":"https://api.github.com/repos/adlnet/xAPI-Spec/issues/874","repository_url":"https://api.github.com/repos/adlnet/xAPI-Spec","labels_url":"https://api.github.com/repos/adlnet/xAPI-Spec/issues/874/labels{/name}","comments_url":"https://api.github.com/repos/adlnet/xAPI-Spec/issues/874/comments","events_url":"https://api.github.com/repos/adlnet/xAPI-Spec/issues/874/events","html_url":"https://github.com/adlnet/xAPI-Spec/issues/874","id":137244558,"number":874,"title":"ISO 8601- are **unnecessary** leading zeros permitted?","user":{"login":"garemoko","id":1363163,"avatar_url":"https://avatars.githubusercontent.com/u/1363163?v=3","gravatar_id":"","url":"https://api.github.com/users/garemoko","html_url":"https://github.com/garemoko","followers_url":"https://api.github.com/users/garemoko/followers","following_url":"https://api.github.com/users/garemoko/following{/other_user}","gists_url":"https://api.github.com/users/garemoko/gists{/gist_id}","starred_url":"https://api.github.com/users/garemoko/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/garemoko/subscriptions","organizations_url":"https://api.github.com/users/garemoko/orgs","repos_url":"https://api.github.com/users/garemoko/repos","events_url":"https://api.github.com/users/garemoko/events{/privacy}","received_events_url":"https://api.github.com/users/garemoko/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/adlnet/xAPI-Spec/labels/patch","name":"patch","color":"009800"}],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2016-02-29T12:47:11Z","updated_at":"2016-03-16T18:14:10Z","closed_at":"2016-03-16T18:14:10Z","body":"In short: is the following duration valid, or should it be rejected by LRSs?\r\n\r\n`PT0005M25S`\r\n\r\nISO 8601 section 3.6 says: \r\n\r\n\"If a time element in a defined representation has a defined length, then leading zeros shall be used as required.\"\r\n\r\nBut does that mean they can't be used when not required? If you can use them, is there any limit on string length? "}}