FOP is an XSL-FO processor.
As a convenience, FOP distribution comes with Xalan, witch is an XSLT processor, that is fully compliant with XSLT 1.0 recommendation.
So, yes, all xsl:* you cited can be used through FOP, given that this is feeded to Xalan.
To get examples, you should read XSLT related sites, FOP doc only provides XSL-FO examples. Refer to FOP links  &  for further information.