{"action":"created","issue":{"url":"https://api.github.com/repos/w3c/ttml1/issues/220","repository_url":"https://api.github.com/repos/w3c/ttml1","labels_url":"https://api.github.com/repos/w3c/ttml1/issues/220/labels{/name}","comments_url":"https://api.github.com/repos/w3c/ttml1/issues/220/comments","events_url":"https://api.github.com/repos/w3c/ttml1/issues/220/events","html_url":"https://github.com/w3c/ttml1/issues/220","id":188938130,"number":220,"title":"lineHeight \"computed\" inheritance","user":{"login":"palemieux","id":4871350,"avatar_url":"https://avatars.githubusercontent.com/u/4871350?v=3","gravatar_id":"","url":"https://api.github.com/users/palemieux","html_url":"https://github.com/palemieux","followers_url":"https://api.github.com/users/palemieux/followers","following_url":"https://api.github.com/users/palemieux/following{/other_user}","gists_url":"https://api.github.com/users/palemieux/gists{/gist_id}","starred_url":"https://api.github.com/users/palemieux/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/palemieux/subscriptions","organizations_url":"https://api.github.com/users/palemieux/orgs","repos_url":"https://api.github.com/users/palemieux/repos","events_url":"https://api.github.com/users/palemieux/events{/privacy}","received_events_url":"https://api.github.com/users/palemieux/received_events","type":"User","site_admin":false},"labels":[{"id":279479775,"url":"https://api.github.com/repos/w3c/ttml1/labels/enhancement","name":"enhancement","color":"84b6eb","default":true}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":7,"created_at":"2016-11-12T22:18:16Z","updated_at":"2016-11-13T22:07:27Z","closed_at":null,"body":"Section 8.4.4.2(6)(b) specifies that `lineHeight` is set to its initial value of `\"normal\"` on `<region>`.\r\n\r\nSection 8.4.4.2(6)(c) specifies that `<body>` will inherit the _computed value_ of `lineHeight` from its parent `<region>`.\r\n\r\nThe computed value of `lineHeight` on `<region>` is therefore, say, 125% of the computed value of `fontSize` on `<region>`, so `125/15rh`.\r\n\r\nSo the computed values of `lineHeight` and `fontSize` on `<body>` are `125/15rh` and `400/15rh`, respectively.\r\n\r\nThese computed values are then propagated down by inheritance to the `<p>`, where \"Hello\" and \"Bye\" will overlap since the font size is significantly larger than the line height.\r\n\r\nIs this the intended outcome and correct interpretation, or alternatively should initial values only be applied to elements to which the styles applies or does \"normal\" have special inheritance rules?\r\n\r\n```\r\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n<tt xmlns=\"http://www.w3.org/ns/ttml\" xmlns:tts=\"http://www.w3.org/ns/ttml#styling\">\r\n    <head>\r\n        <layout>\r\n            <region xml:id=\"bottom\" tts:origin=\"10% 10%\" tts:extent=\"80% 80%\" />\r\n        </layout>\r\n    </head>\r\n    <body tts:fontSize=\"4c\">\r\n        <div>\r\n            <p region=\"bottom\" begin=\"00:00:10.000\" end=\"00:00:20.000\">Hello<br/>Bye</p>\r\n        </div>\r\n    </body>\r\n</tt>\r\n```\r\n\r\nNOTE: `100rh` equals the computed height of root container."},"comment":{"url":"https://api.github.com/repos/w3c/ttml1/issues/comments/260216507","html_url":"https://github.com/w3c/ttml1/issues/220#issuecomment-260216507","issue_url":"https://api.github.com/repos/w3c/ttml1/issues/220","id":260216507,"user":{"login":"skynavga","id":377455,"avatar_url":"https://avatars.githubusercontent.com/u/377455?v=3","gravatar_id":"","url":"https://api.github.com/users/skynavga","html_url":"https://github.com/skynavga","followers_url":"https://api.github.com/users/skynavga/followers","following_url":"https://api.github.com/users/skynavga/following{/other_user}","gists_url":"https://api.github.com/users/skynavga/gists{/gist_id}","starred_url":"https://api.github.com/users/skynavga/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/skynavga/subscriptions","organizations_url":"https://api.github.com/users/skynavga/orgs","repos_url":"https://api.github.com/users/skynavga/repos","events_url":"https://api.github.com/users/skynavga/events{/privacy}","received_events_url":"https://api.github.com/users/skynavga/received_events","type":"User","site_admin":false},"created_at":"2016-11-13T22:07:27Z","updated_at":"2016-11-13T22:07:27Z","body":"Yes."}}
{"actor":{"display_login":"skynavga"}}