Creates a link to the parent of a WikiPage. This is mainly intended to work with WikiAttachments, that is, if the page you are referring to is an attachment, it will generate the correct link.
Why would you use this instead of a standard anchor? The LinkToTag automatically adds things like the correct class information (for styles), the jspwiki.baseURL property, attachment links, etc.
<wiki:~LinkToParent page="<page name>" format="anchor|url">
The parent of this attachment is <wiki:LinkToParent><wiki:ParentPageName /></wiki:LinkToParent>.