Insert day-of-the-week through xmlspy

[Isabelle]

Hello,

This topic is sent to users of XMLSPY.

I use XMLSPY and FOP to create stylesheets and pdf documents from xml
files.
I recieve a data with date format, i.e. CCYY-MM-DD. But I must add the
day of the week on my document. I can't modify my entering xml file by
adding this information. So the solution I founded is implementing
EXSLT to have tools that would give me the day of the week.

But I never founded (nor in XMLSPY, nor in EXSLT site) HOW to
implement. Examples show me strings of XSL files using EXSLT
functions, but XMLSPY first creates a SPS file which generate the XSL
Stylesheet. So how can I add the EXSLT tools to the SPS file?