Besides the functions listed in the previous section, there is a special function for the coordinates. This function computes the length, the area, or the volume of a domain with 1, 2, or 3 dimensions, respectively. This function is only available if the coordinates have been coordinates for the field.

Table 28.2: List of Check Values lists the values to check by combining the restriction functions R and the functions F to obtain the check values.

Table 28.2: List of Check Values

		Restriction Functions
		(Scalar)
Functions for Obtaining the Extracted Value	Minimum
	Maximum
	Average
	Weighted Average
	Closest Node
	Integral
Coordinate Functions	Length
	Area
	Volume