Since the Cosmos could contain thousands of different namespaces, each with many elements, one stylesheet, handling all of these elements, would contain thousands of templates.
A transformation pipeline task transforms the input with multiple stylesheets in a specific order. The result of one transformation will be the input for the next, or the result after the last transformation.
You can form a "pipeline" statically with taking the view-scoped content of one object as the input for the transformation in another view-scoped content access.