Could you clarify a bit the problem you are trying to solve? Are you trying to track views/impressions of your HTML/JS content placed inside an Omniscope IOK file, for example inside a Content View?
You seem to want to use AppNexus technology/analytics?
Do you also have other HTML/JS web pages such as your Omniscope download pages being tracked on the open internet as well?
That sounds like a question for AppNexus. Pixel tracking of content displayed in Omniscope is possible, but each service will have its own implementation.
If you will be using AppNexus technology for web analytics, you may want to add your vote to this discussion on adding an AppNexus API Connector to Omniscope: