"direction (i.e. converting output coordinates back into input coordinates). If this attribute is non-zero, the inverse transformation is available. Otherwise, it is not.
’s current Frame and its base Frame (as specified by the Current and Base attributes). This value is given by the boolean AND of the TranInverse values which apply to each of the individual sub-Mappings required to perform this conversion. The TranInverse attribute value for a FrameSet may therefore change if a new Base or Current Frame is selected.
An error will result if a Mapping with a TranInverse value of zero is used to transform coordinates in the inverse direction.