OGP (The Open Graph Protocol)の仕様

The Open Graph Protocol

The Open Graph protocol enables any web page to become a rich object in a social graph. For instance, this is used on Facebook to enable any web page to have the same functionality as a Facebook Page.

下記の4つが必須。URLリンター - Facebook開発者で試すと、省略した場合でもそれなりのもので補完してくれる？

• og:title - The title of your object as it should appear within the graph, e.g., "The Rock".
• og:type - The type of your object, e.g., "movie". Depending on the type you specify, other properties may also be required.
• og:image - An image URL which should represent your object within the graph.
• og:url

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