Need simple xquery help

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Given: 

Example.xml
____________________________________________________________________
<?xml version="1.0"?>
<pmcatalog>
	<manufacture>
		<mfg img="manufacturerlogos/arnelsonlogo.gif"
mfgID="G-mf-A.R._N-641" name="Nelson">
			<pmdata>
				<pmgroup>
					<keyword>pgroup8</keyword>
					<product>
						<pmn modelid="234">
						</pmn>
					</product>
				</pmgroup>
				<pmgroup>
					<keyword>pgroup1</keyword>
					<product>
						<pmn modelid="345">
						</pmn>
					</product>
				</pmgroup>
				<pmgroup>
					<keyword>pgroup2</keyword>
					<product>
						<pmn modelid="456">
						</pmn>
					</product>
				</pmgroup>
			</pmdata>
		</mfg>
		<mfg img="manufacturerlogos/barns.gif" mfgID="barnsid"
name="Barns">
			<pmdata>
				<pmgroup>
					<keyword>pgroup7</keyword>
					<product>
						<pmn modelid="567">
						</pmn>
					</product>
				</pmgroup>
				<pmgroup>
					<keyword>pgroup10</keyword>
					<product>
						<pmn modelid="890">
						</pmn>
					</product>
				</pmgroup>
				<pmgroup>
					<keyword>pgroup22</keyword>
					<product>
						<pmn modelid="556">
						</pmn>
					</product>
				</pmgroup>
			</pmdata>
		</mfg>
	</manufacture>
</pmcatalog>
____________________________________________________________________


The following query returns ALL the 'mfgs' - I don't understand why the
"where" doesn't restrict it to only the Nelson entry.

for $pmgroup in
doc("file:example.xml")/pmcatalog/manufacture/mfg/pmdata/pmgroup
where contains($pmgroup/keyword, "pgroup8") 
return $pmgroup/../../../mfg

1)  This returns mfg for Barns as well.  I don't understand.
2)  If I want to return a Node WITHOUT its children - how can I achieve
this?  The desired results for my query would be:

<mfg img="manufacturerlogos/arnelsonlogo.gif" mfgID="G-mf-A.R._N-641"
name="Nelson">
	<pmn modelid="234"></pmn>
	<pmn modelid="345"></pmn>
	<pmn modelid="456"></pmn>
</mfg>


I realize that I can "CONSTRUCT"  OUTPUT via:

return <mfg img='{$ pmgroup /../../../@img/string()}' mfgID='{$ pmgroup
/../../../@mfgID/string()}' name='{$ pmgroup /../../@name/string()}' >
etc...

But how does one retrieve only the node "header" (for lack of a term to use)
- without its subsequent children.  Picking and choosing nodes with their
attributes without the children.

Hopefully someone can show me the error of my ways :)
Thanx
Walt