A Coherent and Non—Invasive Open Analysis Architecture and Framework with Applications in CMS

The CMS IGUANA project has implemented an open analysis architecture that enables the creation of an integrated analysis environment.In this "analysis desktop" environment a physicist is able to perform most analysis-related tasks,not just the presentation and visualisation steps usually associated with analysis tools.The motivation behind IGUANA's approach is that phsics analysis includes much more than just the visualisation and data presentation.Many factors contribute to the increasing importance of making analysis and visualisation software an integral part of the experiment's software:object oriented and ever more advanced data models,GRID,and automated hierarchical storage management systems to name just a few.At the same time the analysis toolkits should be modular and non-invasive to be usable in different contexts within one experiment and generally across experiments.Ideally the analysis environment would appear to be perfectly customised to the experiment and the context,but would mostly consist of generic components.We describe how the IGUANA project is addressing these issues and present both the architecture and examples of how different aspects of analysis appear to the users and the developers.