Field Descriptions for Web Hooks

On http://en.support.wordpress.com/webhooks/ it lists all the available fields but it doesn’t describe what they are — yes, most of them are obvious but things like comment_status, guid, menu_order, ping_status, pinged, post_content_filtered, post_name post_parent, post_status, post_type, to_ping

aren’t explained or readily obvious, especially what valid output exists for them.

Would appreciate some guidance, thanks!

http://wordpress.org/extend/plugins/hookpress/