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**xAPI (Experience API):**A set of learning technology standards (IEEE 9274.1.1) and specifications for instrumentation of learning used to track and record learning experiences (both formal and informal) across various platforms.

**xAPI Profiles:**Specialized definitions used within the xAPI standard to ensure semantic interoperability when recording specific types of learning activities.

**xAPI Statement:**The data format used by xAPI to document a learning activity, consisting of an actor, verb, and object (e.g., "John completed Module 2").