Blackboard provides the Building Blocks API and Web Services Specifications for Blackboard Learn 9.1 Service Pack (SP) 3 and later in an HTML package in Javadoc format.
For 9.1 SP 6 and later, Blackboard also provides a "diff file" to detail the changes to the Building Blocks API and Web Services Specifications since the previous release of Blackboard Learn. This navigable list of added, removed, and changed public APIs is an HTML package in Javadoc format.
You can view the API or Changes packages directly in HTML using the following links. You can also download the packages through Behind the Blackboard on the Download Files page for each release.
9.1 SP 5 View API
9.1 SP 4 View API
9.1 SP 3 View API