This one is my personal favorite.  I wrote it using the Kafka framework that I am building, but it does something different than the other examples.  The example relies on a document called database.xml, which contains the list of comic book characters and their secret identities.  The document id.xsl loads this XML document and performs a lookup in order to build the SOAP response.  All this without any code.  I love XSL.

 Function GetSecretIdentity( codename as String ) as String