Rebecca - what appears in the pipeline is dependent on the content handler invoked. The only special one I can think of immediately is the XML handler, which places an object called node in the pipeline. The CGI handler (for HTML forms) places strings with the form input names unless the input is called $xmldata. $xmldata goes to the XML handler, and if it is XML ends up as node.
If you ever want to know for sure, there are some services in the WmPublic package that you may find helpful: pub.flow:savePipeline - save the pipeline to a named memory location
pub.flow:savePipelineToFile - saves the pipeline as a file in the IntegrationServer4/pipeline directory
pub.flow:restorePipeline - restores a pipeline from memory
pub.flow:restorePipelineFromFile - restores from the file
If you save to memory, the pipeline is local to your Developer session, and goes away when you close the session. The file system ones are available to anyone.
So you can save the pipeline as the first step in your flow, and then run the corresponding restore to view the actual contents at runtime. Then you’ll know exactly what to expect.
Hope this helps,
Theo
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