URL of the OutputLocation for links in the conversion output.

When the output format for the conversion is HTML or XML, the location of each extracted image or attachment will be stored as a link. While OutputLocation must be a folder name, OutputReference should be the equivalent location expressed as a URL, so it will work when used in the links in the conversion output. 

For example, on a web server OutputLocation might be c:\inetpub\user1\temp and OutputReference would be the virtual path to this folder, /user1/temp.