Name
independentVarPts — Simple definition of independent breakpoints
Content model
independentVarPts :  varID,  [name],  [units],  [sign],  [extrapolate]
     (#PCDATA)
Attributes
| varID - the XML id of the input signal corresponding to this independent variable | 
| name (optional) - the name of the function's independent variable input signal | 
| units (optional) - the units of measure for the independent variable | 
| sign (optional) - the sign convention for the independent variable | 
| extrapolate (optional) - extrapolation flags for IV out-of-bounds | 
Description
An independentVarPts element is a simple list of breakpoints and
 contains a mandatory varID identifier as well as optional name,
 units, and sign convention attributes.  An optional extrapolate
 attribute describes how to extrapolate the output value when the
 input value exceeds specified values. This element is used for simple
 functions that don't share breakpoint or table values with other
 functions.