This is what says Help :
Determines whether or not the specified object is an animCurve (i.e. its nodeType is one of animCurveTL, animCurveTA, animCurveTU, animCurveTT, animCurveUL, animCurveUA, animCurveUU or animCurveUT)
You guys know what these letters mean ? animCurve TA - what TA means ?
TL
TU and all the others...
Please someone tell me what i need to know about these guys...