author_url
The WordPress Jekyll importer will save information about the original post author.
---
author_url: http://example.com/john.smith
---
Inconsistant Behavior
Other importers use a more YAMLly way of importing author information.
---
author:
name: "John Smith"
url: "http://example.com/john-smith"
image: "http://example.com/john-smith.png"
---
Next