XSLT Debugging
There are some techniques to help debug your XSLT files. Malformed XSLT will cause error messages to appear in the WebLogic console. In addition, you can test the layout of a portal zone in isolation using this URL from a browser that is logged-in to the Oracle Utilities Customer Care and Billing system:
http:<server>:<port>/portal?type=xslTest&service=CILCALZP&xslURL=/WEB-INF/xsl/linkValueGrid.xsl&ACCT_​ID=5922116763
(Ignore any JavaScript errors)
The important parameters are the service, the xslURL, and the service keys.