OpenCmsVarLink
From OpenCms Wiki
OpenCmsVarLink is used to contain a relative path to a resource on the OpenCms system, like /en/myfolder/myfile.html or just myfile.html, or a complete URL like http://www.web.com/myurl.html.
The default widget for OpenCmsVarLink is the VfsFileWidget. Existence checks are performed for local resources.
Example usage
<xsd:element name="NameHere" type="OpenCmsVarLink" />