Path object returned from Path.parse and taken by Path.format.
See also:
Fields
E.g. "C:\" for "C:\path\dir\index.html"
E.g. "index" for "C:\path\dir\index.html"
E.g. ".html" for "C:\path\dir\index.html"
E.g. "C:\path\dir" for "C:\path\dir\index.html"
E.g. "index.html" for "C:\path\dir\index.html"