{"action":"created","issue":{"url":"https://api.github.com/repos/w3c/wcag/issues/184","repository_url":"https://api.github.com/repos/w3c/wcag","labels_url":"https://api.github.com/repos/w3c/wcag/issues/184/labels{/name}","comments_url":"https://api.github.com/repos/w3c/wcag/issues/184/comments","events_url":"https://api.github.com/repos/w3c/wcag/issues/184/events","html_url":"https://github.com/w3c/wcag/pull/184","id":151373147,"number":184,"title":"Issue181 - proposal for changed/expanded notes in \"large scale (text)\" definition","user":{"login":"patrickhlauke","id":895831,"avatar_url":"https://avatars.githubusercontent.com/u/895831?v=3","gravatar_id":"","url":"https://api.github.com/users/patrickhlauke","html_url":"https://github.com/patrickhlauke","followers_url":"https://api.github.com/users/patrickhlauke/followers","following_url":"https://api.github.com/users/patrickhlauke/following{/other_user}","gists_url":"https://api.github.com/users/patrickhlauke/gists{/gist_id}","starred_url":"https://api.github.com/users/patrickhlauke/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/patrickhlauke/subscriptions","organizations_url":"https://api.github.com/users/patrickhlauke/orgs","repos_url":"https://api.github.com/users/patrickhlauke/repos","events_url":"https://api.github.com/users/patrickhlauke/events{/privacy}","received_events_url":"https://api.github.com/users/patrickhlauke/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":8,"created_at":"2016-04-27T12:29:41Z","updated_at":"2016-05-05T14:17:03Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/w3c/wcag/pulls/184","html_url":"https://github.com/w3c/wcag/pull/184","diff_url":"https://github.com/w3c/wcag/pull/184.diff","patch_url":"https://github.com/w3c/wcag/pull/184.patch"},"body":"Based on discussions on GitHub https://github.com/w3c/wcag/issues/181 and on mailing list https://lists.w3.org/Archives/Public/w3c-wai-gl/2016AprJun/0214.html\r\n\r\nAs the definition itself of \"Large scale (text)\" https://www.w3.org/TR/WCAG20/#larger-scaledef is normative, this proposed change leaves the \"14pt bold / 18pt\" text itself intact, and instead reorganises, changes and expands the following non-normative/informative notes to actually qualify what \"points\" mean in a far more precise way.\r\n\r\nNote that even while trying to untangle the current notes, it was still not completely clear to me whether WCAG 2.0 actually means physical points as measured with a ruler on the screen, or not. As amply discussed already, if this IS the intention of the definition, than it would invalidate the whole premise of the normative definition, since there is NO WAY for an author to ensure any particular physical rendering size. It is all dependent on user agent and operating system defaults / settings, and to be of any use for actual authors it MUST be at least anchored on the assumption that the UA's base font size is appropriate, with \"large scale\" being relative to that. These rewritten notes try (as much as was possible without touching the normative part of the glossary definition) to convey this."},"comment":{"url":"https://api.github.com/repos/w3c/wcag/issues/comments/217166136","html_url":"https://github.com/w3c/wcag/pull/184#issuecomment-217166136","issue_url":"https://api.github.com/repos/w3c/wcag/issues/184","id":217166136,"user":{"login":"alastc","id":216630,"avatar_url":"https://avatars.githubusercontent.com/u/216630?v=3","gravatar_id":"","url":"https://api.github.com/users/alastc","html_url":"https://github.com/alastc","followers_url":"https://api.github.com/users/alastc/followers","following_url":"https://api.github.com/users/alastc/following{/other_user}","gists_url":"https://api.github.com/users/alastc/gists{/gist_id}","starred_url":"https://api.github.com/users/alastc/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alastc/subscriptions","organizations_url":"https://api.github.com/users/alastc/orgs","repos_url":"https://api.github.com/users/alastc/repos","events_url":"https://api.github.com/users/alastc/events{/privacy}","received_events_url":"https://api.github.com/users/alastc/received_events","type":"User","site_admin":false},"created_at":"2016-05-05T14:17:02Z","updated_at":"2016-05-05T14:17:02Z","body":"I just wonder if that explanation is needed: most people didn't realise there was a difference, so stating this solves the problem:\r\n\r\n>  The ratio between sizes given in \"points\" and CSS pixels is approximately 1pt = 1.333px.\r\n\r\nIf they did know the difference, they don't need the explanation.\r\n\r\nThe other key bit needed is regarding the relative sizing, which can be accomplished with:\r\n\r\n> In most user agents, the default text size is 16px (approximately 12pt). As such, 14pt and 18pt are roughly equivalent to 18.5px and 24px. If using relative units that equates to 1.2em and 1.5em / 120% and 150% of the default text size (assuming that the body text size has not been changed from the user agent's default).\r\n> \r\n> Although some user agents may have a default text size that differs from the common 16px/12pt, this definition will assume a default text size of 16px when calculating the size of larger text.\r\n\r\nAuthors know what to do, testers know how to test... job done?"}}