[xsl] Nodes selected by copy-of(.) versus snapshot(.)?

["Costello, Roger L." <costello@xxxxxxxxx>]

Hi Folks,

I wish to confirm that I correctly understand what nodes are selected using
copy-of(.) versus using snapshot(.)

I created a 4-slide Powerpoint document that graphically depicts the nodes
selected.

Would you take a look and let me know if the slides are correct please?

http://www.xfront.com/copy-of-versus-snapshot.pptx

Thanks!

/Roger