File and directory management functions.

Entity	Type	Scope	Short Description
is_dir	function	public	Returns TRUE if the specified location is a directory.
is_file	function	public	Returns TRUE if the specified location is a regular file.
is_root	function	public	Returns TRUE if the specified location is a root directory.
is_url	function	public	Returns TRUE if the specified location is a URL.
scheme	function	public	Returns the scheme followed by a colon (:) of the specified location.
sdecode	function	public	Passed any string value, decode from URL transmission.
sdrive	function	public	Returns the drive letter followed by a colon (:) if a drive is specified in the location.
sdrivedir	function	public	Returns the drive letter or scheme and the path of subdirectories, if any, including the trailing slash.
sfext	function	public	Returns the file name extension, if any, including the leading period (.).
sfextrep	function	public	Replaces an extension of the specified file.
sfname	function	public	Returns the base file name without any extensions.
sfnameext	function	public	Returns the base file name with file extension.
smakepath	function	public	Creates a single path name, composed of a base path name and file or directory name.