(Optional) Documentation: Basic Ideas in Class Programming (15m)
This book from documentation describes how to create and use classes in InterSystems IRIS, particularly classes that define objects. Topics include InterSystems Objects architecture, class definitions, the class dictionary, the InterSystems class library, and development tools.
Click http://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=GOBJ_intro link to open resource.