Open Graph Protocol
오픈 그래프 프로토콜은 어떠한 인터넷 웹사이트의 HTML 문서에서 head -> meta 태그 중 "og:XXX"가 있는 태그들을 찾아내어 보여주는 프로토콜이다.
Example
OpenGraph tags in HTML5 might look like this:
<meta property="og:title" content="Example title of article">
<meta property="og:site_name" content="example.com website">
<meta property="og:type" content="article">
<meta property="og:url" content="http://example.com/example-title-of-article">
<meta property="og:image" content="http://example.com/article_thumbnail.jpg">
<meta property="og:image" content="http://example.com/website_logo.png">
<meta property="og:description" content="This example article is an example of OpenGraph protocol.">