regarding strip-space

hi
I read in the XSLT Reference that xsl:strip-space would actually remove the 
whitespace-only text nodes from the source.
My question is ..( sorry its a bit weird)
1.what is a whitespace-only node?? ( is it an empty element of kind 
<myel></myel>)??

2.If i have empty elements like what i have shown above(<myel></myel>)
and if i have to pick all the myel elements which have some text in it ( non 
empty ) then , i beleive the only way to do it is through a condition
<xsl:for-each select = //myel[not(string-length(.) = 0)]">
is it true??

or are there any better ways to do it?

Subbu


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