Multiple Conditions in xsl:if.

Hi,
	I am trying to use multiple conditions in xsl:if.
Means, I have an input value and I want know if the input is in my list of
values.
eg:
(This syntax is not correct).
<xsl:if test="$testid = 'Y' | 'N' | 'P' | 'K' >
	do something
</xsl:if.

Please let me know how can I achive this.

Thanks for your help.

Raj.


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