Several options modify the output: If the value is present, then it will be used as a display value. Any manual piping (using the magic word or similar) present in will be overridden by the value if present. If the value is present, then it will override as a target, but the result will still be using either the value from , or the result of formatting . If is true, then the page portion of the link is italicized if present. If is true, then the section portion of the link is italicized if present. If is a non-empty string, then that value is used as a category name, and that category will be applied if the resulting target of the link (no matter whether through or through ) doesn't exist.