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jcs:first-of() Function

The jcs:first-of() function returns the first nonempty (non-null) item in a list. In the following example, if the value of a is empty, b is checked. If the value of b is empty, c is checked. If the value of c is empty, d is checked. If the value of d is empty, the string none is returned.



jcs:first-of($a, $b, $c, $d, "none")

The following example selects the description of a logical interface if there is a logical interface description. If not, it selects the description of the (parent) physical interface if there is a physical interface description. If not, it selects the concatenation of the physical interface name with a “ .” and the logical unit number.



<xsl:variable name="description"
        select="jcs:first-of(description, ../description, concat(../name, '.', name))"/>

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