Parsing XPATH Applescript

I’m looking for some help parsing an XPATH that would then paste into Numbers. I have a script that worked with XML.
http://www.sportsline.com/nfl/odds/", "//div[@class=‘row-group’]

This is a portion of the script for the XML, and I’m not really sure where to start to parse XPath. I was hoping for some guidance and help.

set txt to do shell script "curl -s " & "http://www.nfl.com/liveupdate/scorestrip/ss.xml"

set pasteStr to ""
repeat with p in txt's paragraphs
	set lineTxt to p's text
	if lineTxt starts with "    <g " then ¬
		set pasteStr to pasteStr & ¬
			getVal(lineTxt, "t=\"") & tab ¬
			& getVal(lineTxt, "h=\"") & tab ¬
			& getVal(lineTxt, "hs=\"") & tab ¬
			& getVal(lineTxt, "v=\"") & tab ¬
			& getVal(lineTxt, "vs=\"") & tab ¬
			& getVal(lineTxt, "Q=\"") & return
	
end repeat
set the clipboard to pasteStr


Do a search for xml and a few will show up.
Infound the one xml running slowly was most helpful to me