Complex sentence: The AA1000 Assurance Standard, launched in 2003, aiming to provide a systematic and consistent framework for assurance of performance, was categorized as the first non-proprietary, open-source Assurance Standard that covers the full range of an organisation's disclosure and performance.
Split into simpler sentences: The AA1000 Assurance Standard, launched in 2003, aimed to provide a systematic and consistent framework for assurance of performance. The AA1000AS is positioned as the first non-proprietary, open-source Assurance Standard that covers the full range of an organisation's disclosure and performance.