Dr Antonio Pierro (INFN-BARI)
The web application service as part of the conditions database system serves applications and users outside the event-processing. The application server is built upon conditions python API in the CMS offline software framework. It responds to http requests on various conditions database instances. The main client of the application server is the conditions database web GUI which currently exposes three main services. The tag browser allows user to see the availability of the conditions data in terms of their version (tag) and the interval of validity (iov). The global tag component is used by physicists to inspect the organization of the tags in a given data taking or data production while production managers use the web service to produce such tag hierarchy. History chart plotting service creates dynamic summary and distribution charts of the payload data in the database. Fast graphical overview of different information greatly helps physicists in monitoring and validating the calibration data stored in the condition database.