I have searched the group and think I found the answer to my inquiry. The pertinient thread is below. I would like to have this confirmed.
TIA Greg Albert
"The Sketch feature replaces the Sketched Datum Curve. It is similar, but has a few important differences. First, it autohides after you use it to create a feature. Also, it disappears from the model tree after you create a feature with it so you don't have a cluttered mess of 'Sketch' followed by 'Extrude' all the way down the tree (if you set the tree filter correctly) - it reappears if you delete the feature so you can re-use it. It remains associative to the feature unlike WF 1 (this association can be broken if desired). As for creation, it is just like a sketched datum curve. Pick a plane, orient it and add the necessary references. Regards David Janes Jun 23 2004, 8:45 am"