Well, I'd have thought _you_ would have schema validated your input:-)

In which case, assuming @days is of the appropriate sequence type, the
typed value of the attribute as seen by xpath will alr4eady be a
sequence of dayTimeDurations and you do not have to do anything.

If you do want to tokenize and cast, just apply the cast to teh sequence

  <xsl:variable name="ds" select="for $d in tokenize(@day,'\s+') return
  xs:dayTimeDuration($d)"/>



(tokenize(//topics/@days would generate an error if it picked up two
attributes)

David

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