I can not determine the "base URI of the containing element node" as
descripte in http://www.w3.org/TR/xslt20/#uri-references.

I aim to include a stylesheet from the very same location as the
including one. While developing I'm initiating the transformation from
my IDE. Later on it will be part of a jar file. If I make the
href="/.../to-be-included.xsl" absolut, it works fine. If I omit the
directory path like href="to-be-included.xsl" the transformer does not
find it.

Do you have an idea what basics I'm missing here?

   Templates templates = transformerFactory.newTemplates(source);
   Transformer transformer = templates.newTransformer();

provided that stylesheet is prefixed with "file:/"
--
Vladimir Nesterovsky
http://www.nesterovsky-bros.com/