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QTI-SDK is an IMS QTI (Question & Test Interoperability) Software Development Kit for PHP supporting a wide range of features described by the IMS QTI specification family.

It provides all the necessary mechanisms for the backend-side of a PHP application aiming at delivering assessment tests following the QTI standard.

• Targets QTI 2.0, 2.1 and 2.2
• Complete QTI Information Model support. Assessment contents can be loaded, modified and saved in an easy way
• QTI Rule Engine to drive pre-conditions and branch rules, response/outcome/template processing
• Custom Operator Hooks to extend QTI capabilities
• Wilbert Kraan's / Steve Lay's Goldilocks Rendering to transfer contents in a client-side friendly format
• CSS Parser for direct QTI Information Model mapping at rendering time
• Item and Test Sessions (with lightning fast binary persistence)
• Nice and Clean API for QTI Document manipulation/traversal
• Selection and Ordering for complex item flow within your tests