As a custom solutions shop that deals with IBM Cognos on a daily basis, one of the problems that comes up frequently is the integration of a specific report into an existing corporate web portal without involving Cognos Connection. Most commonly this is a dashboard which takes up a small portion of screen real estate in order to show something relevant to the rest of the page content or possibly something that has great importance and always needs to be in the user’s face. Typically this type of work fell to the Cognos SDK URL invocation. The Mashup Service gives us yet another approach to solve this sort of requirement.
IBM Cognos and Motio Best Practices Blog
Demystify the differences between the IBM Cognos SDK and Mashup Service. If you are facing a custom solution centering around your IBM Cognos BI, then this article will help align you with the correct solution.