xsl version 1. one stylesheet to produce xml destined

Hi,
I'm new to xsl and am perfectly happy for someone to simply point me toward
the relevant section of a tutorial...

I've been using xsl to produce xml successfully containing certain element
values that relate to my test database. I'd like to amend the xsl to
recognise whether i'm running this particular transformation for this
customer for the test database or is it for the production database.

one xsl to:
either
customer a, transforming "orders" = test mode to use actual values; test,
test1, usemytest
or
customer b, transforming "orders" = production mode to use actual values;
production, productionvalue, usemyproduction

I thought of using an external table and key. Key is driving me potty. I'll
persist if there isn't a tidier option


Thanks
Michael


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