Hi Derek,
Thanks for the reply. I already tried that, having found the XML import (as you highlighted) in the online help section. It did not work.
In theory, so I am told, the XML (which came from an outside program, exported that is) is easily brought into ArcGIS. I have seen the points (from another file) displayed in ArcScene.
I was given 2 files, one is XML and one is *.xsd, I have attached them in a zip file. Any advice?