{"action":"opened","issue":{"url":"https://api.github.com/repos/schemaorg/schemaorg/issues/1681","repository_url":"https://api.github.com/repos/schemaorg/schemaorg","labels_url":"https://api.github.com/repos/schemaorg/schemaorg/issues/1681/labels{/name}","comments_url":"https://api.github.com/repos/schemaorg/schemaorg/issues/1681/comments","events_url":"https://api.github.com/repos/schemaorg/schemaorg/issues/1681/events","html_url":"https://github.com/schemaorg/schemaorg/issues/1681","id":239437032,"number":1681,"title":"a \"mainEntity\" of something is always an \"about\" value too - express as subPropertyOf","user":{"login":"danbri","id":170265,"avatar_url":"https://avatars3.githubusercontent.com/u/170265?v=3","gravatar_id":"","url":"https://api.github.com/users/danbri","html_url":"https://github.com/danbri","followers_url":"https://api.github.com/users/danbri/followers","following_url":"https://api.github.com/users/danbri/following{/other_user}","gists_url":"https://api.github.com/users/danbri/gists{/gist_id}","starred_url":"https://api.github.com/users/danbri/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/danbri/subscriptions","organizations_url":"https://api.github.com/users/danbri/orgs","repos_url":"https://api.github.com/users/danbri/repos","events_url":"https://api.github.com/users/danbri/events{/privacy}","received_events_url":"https://api.github.com/users/danbri/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2017-06-29T10:40:46Z","updated_at":"2017-06-29T10:40:46Z","closed_at":null,"body":"Noting @nicolastorzec 's concern in #1525 that we have mainEntity, about and also mentions properties, this would clarify a relationship between 'mainEntity' and 'about'. The 'about' property can be used in a broad subject/topic oriented way, but also to indicate specific identifiable entities.\r\n\r\nIf we say\r\n\r\n * some_doc mainEntity some_entity, let's have that imply\r\n * some_doc about some_entity. \r\n\r\nThis corresponds with the established meaning of the property.\r\n\r\nIf we later go ahead with the subjectOf proposal (i.e. a property inverseOf 'about'). https://github.com/schemaorg/schemaorg/issues/1670 then we'd want to handle the inverseOf mainEntity too, i.e. subjectOf would be subPropertyOf mainEntityOfPage. "}}
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