Transform - information about a transform connection

This data structure describes a connection between your transform program and a transform daemon. It is returned by the RequestTransform function, and is input to the ReleaseTransform function.
typedef struct {
   const char*    class_name; /* name of transformer class (63 bytes maximum)     */
   const int      fd;         /* connection to transform daemon                   */
} Transform;
The fields in this structure are:
class_name
The name of the transform and class in the format: transformname[_transformclass]. This value must match the name of a transform entry in the transform configuration file (aopxfd.conf). The format of class_name is: transformname[_transformclass].
fd
A UNIX file descriptor that is used to send input and receive output from the transform daemon.