Content Invocation protocols

Protocol for user authentication and activity invocation

This protocol is adopted not only by CUMULATE but by most of the ADAPT² tools. It regulates how user and resource identities is transferred from application to application via the following HTTP parameters

• usr - user identifier, usually login (mandatory)
• grp - group identifier (mandatory), just like a user identifier, but for a group of users (class, research team)
• sid - session identifier (optional), usually 5 character string each application makes a choice whether and how to come up with this parameter (e.g. truncate | Apache Tomcat session id to last 5 characters)
• act - id of the resource (mandatory), each application maintains its own vocabulary of resource ids
• sub - if resource is a collection of multiple resources/steps, then a sub-resource id is supplied (optional)