newbie question

[rpjday]

  i'm looking at the sample.sudoers file on a red hat 6.2
box, and i'm confused about the syntax of the following lines:

##
# Host alias specification
##
Host_Alias	SPARC = bigtime, eclipse, moet, anchor:\
		SGI = grolsch, dandelion, black:\
		ALPHA = widget, thalamus, foobar:\
		HPPA = boa, nag, python
Host_Alias	CUNETS = 128.138.0.0/255.255.0.0
Host_Alias	CSNETS = 128.138.243.0, 128.138.204.0/24, 128.138.242.0
Host_Alias	SERVERS = master, mail, www, ns
Host_Alias	CDROM = orion, perseus, hercules


  what's with the line continuation in the first few lines and
the ":"??  is this just another way of writing these as separate
Host_Alias lines?  the docs don't seem to explain this.

rday