Add topic "Open Graph protocol"

Author: shaedrich

topics/open-graph/index.md

@@ -0,0 +1,17 @@
+---
+aliases: opengraph, open-graph-tags, opengraph-tags, open-graph-protocol
+created_by: Facebook
+display_name: Open Graph protocol
+released: 2010
+short_description: Open Graph is a protocol, originally developed by facebook, inspired by Dublin Core, link-rel canonical, Microformats, and RDFa. 
+topic: open-graph
+logo: open-graph.png
+wikipedia_url: https://en.wikipedia.org/wiki/Facebook_Platform#Open_Graph_protocol
+url: https://ogp.me/
+---
+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 allow any web page to have the same functionality as any other object on Facebook.
+
+For example:
+```html
+<meta property="og:title" content="Example title of article">
+```