By default, only the Data Source parameters are included in the Cognos request from Windchill. This means that any hidden form fields that might otherwise seem like request parameters are stripped off from the http request sent to Cognos (via a HTTP redirect). However, additional parameters can be explicitly added by including a parameter named “extraReportParameters” which specifies a list of parameter names that will be included in the Cognos request. Assume you want to pass a parameter with name, “paramA” with value “valueA” that is not in the list of parameters for the report’s Data Source. The following is an example for specifying this.

Data Source

Also data source parameters can be excluded using the usual "parametersToOmit" request attribute. Note, this is a servlet request object attribute list not a parameter list. it was chosen for simplicity and ease of use.