How to pass into an XSLT program an arbitrarily long

Hi Folks,

My XSLT program has this top-level parameter:

<xsl:param name="airport-identifiers" as="xs:string+" />

I invoke the XSLT program from the command line. I want to pass to the
parameter a sequence of values. I figured that this would do the job:

java -jar saxon9ee.jar test.xml -xsl:test.xsl -o:result.xml
airport-identifiers=KBOS,KJFK

But that didn't work. My XSLT program just thinks there is one airport
identifier, named "KBOS,KJFK"

Is it possible to pass into an XSLT program an arbitrarily long sequence of
parameter values? If so, how?

/Roger