> replace($l_TempString,'&','and')
> get an error message stating the & must be followed by an entity
> reference

yes, that's not a well formed XML fragment.


> replace($l_TempString,'&','and') and replace($l_TempString,'&','and')
> the amp is not replaced.

so presumably $l_TempString does not contain a substring that matches
either "&" or "&".

so what is $l_TempString  ? ie what does <xsl:value-of
select="$l_TempString"/> produce.

It's always helpful to post a complete xml input and complet xslt
stylesheet (in this case, each only need be two or three lines long,


David

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