link attribute contains faces mapping

Link contains the faces mapping. The description says only session id and optional context path. Encode action url is called. I think this is wrong.

Link to an arbitrary URL, either an internal link or an external link.
internal absolute link
Starts with a slash '/' character. The context path will be added. A session id will be added, if needed.
external link
Contains a colon ':' character. The link will not be modified.
internal relative link
Any other strings. A session id will be added, if needed.

Type: java.lang.String