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 [1] & [2] for further information.

[1] http://xmlgraphics.apache.org/fop/resources.html#documents-xslt
[2] http://xmlgraphics.apache.org/fop/resources.html#XSLT-at-Mulberry-Tech

2013/6/11 Stephen More <stephen.more@gmail.com>
Does FOP work with xsl:include and/or xsl:import and xsl:call-template ?

If so are there any examples available ?