{"action":"created","comment":{"url":"https://api.github.com/repos/adlnet/xAPI-Spec/pulls/comments/35958279","id":35958279,"diff_hunk":"@@ -509,11 +509,47 @@ __Verb__: Defines the action being done by the Actor within the Activity within\n \n ## 8.0 Getting More Out of xAPI\n \n+xAPI focuses on the structure of communication between a client and an LRS.  It spares many details of the content to\n+increase flexibility.  The intention in only supplying a basic amount of syntax rules is that Communities of Practice (CoP) can define content (verbs, activity types, contextual relationships, extensions, etc.) for their use cases.  It is very \n+important that such communities exist and share best practices.\n+\n ### 8.1 Extending xAPI\n \n-### 8.2 Profiles\n+xAPI can be extended in a few ways.  The most notable and extensive is Statement Extensions, which allow great flexibility \n+within Statements.  It is recommended that profiles or Communities or Practice agree on how to use extensions for their \n+particular use cases. Implementation details are covered in a <a href=\"#miscext\">later section</a>.  \n+\n+The About Resource is another way xAPI enables extensions.  The LRS may find it useful to communicate features or \n+behaviors beyond this specification to activity provider.  It is hoped that if more information is available about an \n+LRS, that the About Resource captures it.\n+\n+Finally, the set of Resources implemented is not expected to be constrained by this document. While not explicitly \n+defined, this document suggests that no new Endpoints defined in future iterations of this specification will \n+begin with /extensions and that LRSs create other custom xAPI Resources there. \n+\n+<a name=\"COPs\" />\n+\n+### 8.2 Profiles and Communities of Practice\n+\n+A profile of xAPI is a set of rules and/or vocabularies applied to a valid xAPI implementation.  Often, a CoP leverages many best practices to create a profile.\n+\n+A profile will typically define some of the open-ended areas of the specification, such as identifying verbs, activity types, structure and domains for IRIs, and names/possible values within xAPI Resources like the State API.  This is ","path":"xAPI.md","position":29,"original_position":29,"commit_id":"1f51afc6d843f4842267615d0433b0a7e62d5c82","original_commit_id":"1f51afc6d843f4842267615d0433b0a7e62d5c82","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},"body":"How about \"specify\"? 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Likely we can eliminate text in a couple\r\nother stray areas.    The text in the later portion of 8.3 should be\r\nupdated to refer to all \"coinable\" xAPI 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