Here's a [reference link][1]. [1]: http://parsedown.org Here's [one][2] on the next line. [2]: http://parsedown.org Here's [one][3] with a different URL. [3]: http://parsedown.org/tests/ Here's [one][website] with a semantic name. [website]: http://parsedown.org Here's [one] [website] with definition name on the next line. Here's [one][404] with no definition. Here's an image: ![Markdown Logo][image] [image]: /md.png Here's an [implicit one]. [implicit one]: http://google.com Here's an [implicit one][] with an empty link definition. Here's a [multiline one][website] defined on 2 lines.