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Suppose that $state is a sequence which contains, among other things,
at least one function item with signature...
function(element(square)*) as element(square)* Which is the correct and safe way to store a reference to this function in a variable? Is it OPTION A? <xsl:variable name="compute-possible-moves"
select="$state[. instance of function(*)][1]"
as="function(element(square)*) as element(square)*">... OR OPTION B? <xsl:variable name="compute-possible-moves" select="$state[. instance of function(*)][1] treat as function(element(square)*) as element(square)*""> ... OR OPTION C? <xsl:variable name="compute-possible-moves" select="$state[. instance of function(*)][1] treat as function(element(square)*) as element(square)*" as="function(element(square)*) as element(square)*"> My best estimate at the moment, would be option A, but I am not really sure about it.
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