Routine Name:	getfieldnames

Description:	Returns names of all existing fields in specified element.

Usage:		element-fields = {getfieldnames Element}

		element-fields		returned as a single line (i.e., a
					string without carriage returns)
					listing fields of specified element

Example:	echo { getfieldnames /output }

		str name
		foreach name ( {getfieldnames soma })
		echo {name}
		end

Notes:		

See also:	getfield, showfield, setfield

