{"action":"created","comment":{"url":"https://api.github.com/repos/w3c/ttml2/pulls/comments/78284095","id":78284095,"diff_hunk":"@@ -7548,6 +7646,130 @@ span.</p>\n that defined by <bibref ref=\"xsl11\"/>, &sect; 7.8.2.</p>\n </note>\n </div3>\n+<div3 id=\"style-attribute-backgroundExtent\">\n+<head>tts:backgroundExtent</head>\n+<p>The <att>tts:backgroundExtent</att> attribute may be used to specify the extent (size) of a background image\n+independently of the image's intrinsic extent (size).</p>\n+<p>This attribute may be specified by any element type\n+that permits use of attributes in the TT Style Namespace; however, this attribute applies\n+as a style property only to those element types indicated in the following table.</p>\n+<table id=\"style-property-details-backgroundExtent\" role=\"common\">\n+<col css=\"width: 25%;\"/>\n+<col/>\n+<tbody>\n+<tr>\n+<td><emph>Values:</emph></td>\n+<td>\n+<code>auto</code> |\n+<code>contain</code> |\n+<code>cover</code> |\n+<loc href=\"#style-value-measure\">&lt;measure&gt;</loc> <loc href=\"#style-value-measure\">&lt;measure&gt;</loc>\n+</td>\n+</tr>\n+<tr>\n+<td><emph>Initial:</emph></td>\n+<td><code>auto</code></td>\n+</tr>\n+<tr>\n+<td><emph>Applies to:</emph></td>\n+<td>\n+<loc href=\"#document-structure-vocabulary-body\"><el>body</el></loc>,\n+<loc href=\"#content-vocabulary-div\"><el>div</el></loc>,\n+<loc href=\"#content-vocabulary-p\"><el>p</el></loc>,\n+<loc href=\"#layout-vocabulary-region\"><el>region</el></loc>,\n+<loc href=\"#content-vocabulary-span\"><el>span</el></loc>\n+</td>\n+</tr>\n+<tr>\n+<td><emph>Inherited:</emph></td>\n+<td>no</td>\n+</tr>\n+<tr>\n+<td><emph>Percentages:</emph></td>\n+<td>relative to width and height of the applicable <loc href=\"#terms-background-positioning-rectangle\">background positioning rectangle</loc></td>","path":"spec/ttml2.xml","position":204,"original_position":204,"commit_id":"09a014dbb512b3af78f20dedf937b237ce6a7f07","original_commit_id":"09a014dbb512b3af78f20dedf937b237ce6a7f07","user":{"login":"nigelmegitt","id":4988915,"avatar_url":"https://avatars.githubusercontent.com/u/4988915?v=3","gravatar_id":"","url":"https://api.github.com/users/nigelmegitt","html_url":"https://github.com/nigelmegitt","followers_url":"https://api.github.com/users/nigelmegitt/followers","following_url":"https://api.github.com/users/nigelmegitt/following{/other_user}","gists_url":"https://api.github.com/users/nigelmegitt/gists{/gist_id}","starred_url":"https://api.github.com/users/nigelmegitt/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nigelmegitt/subscriptions","organizations_url":"https://api.github.com/users/nigelmegitt/orgs","repos_url":"https://api.github.com/users/nigelmegitt/repos","events_url":"https://api.github.com/users/nigelmegitt/events{/privacy}","received_events_url":"https://api.github.com/users/nigelmegitt/received_events","type":"User","site_admin":false},"body":"This seems a bit confusing - isn't `backgroundExtent` _specifying_ the background positioning rectangle?","created_at":"2016-09-10T21:21:25Z","updated_at":"2016-09-10T21:21:25Z","html_url":"https://github.com/w3c/ttml2/pull/177#discussion_r78284095","pull_request_url":"https://api.github.com/repos/w3c/ttml2/pulls/177","_links":{"self":{"href":"https://api.github.com/repos/w3c/ttml2/pulls/comments/78284095"},"html":{"href":"https://github.com/w3c/ttml2/pull/177#discussion_r78284095"},"pull_request":{"href":"https://api.github.com/repos/w3c/ttml2/pulls/177"}}},"pull_request":{"url":"https://api.github.com/repos/w3c/ttml2/pulls/177","id":84746976,"html_url":"https://github.com/w3c/ttml2/pull/177","diff_url":"https://github.com/w3c/ttml2/pull/177.diff","patch_url":"https://github.com/w3c/ttml2/pull/177.patch","issue_url":"https://api.github.com/repos/w3c/ttml2/issues/177","number":177,"state":"open","locked":false,"title":"Add tts:background{Clip,Extent,Origin}.","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},"body":"Add tts:background{Clip,Extent,Origin}.\r\nAlso add [background {painting,positioning} area] defines (as TBDs).\r\n\r\nSee Issue #175. 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