Principles of Knowledge Representation and Reasoning, Incorporated (KR Inc.) is a not for profit Scientific Foundation incorporated in the state of Massachusetts of the United States of America, concerned with fostering research and communication on knowledge representation and reasoning.

Its primary activities include organizing a series of prestigious conferences, the conferences on Principles of Knowledge Representation and Reasoning, cooperating with workshops on related topics, maintaining informational materials on the World Wide Web, and maintaining KR-related mailing lists.

Due to the COVID-19 pandemic, KR2021 (originally planned to be held in Hanoi, Vietnam), was held vitually.

The 19th International Conference on Principles of Knowledge Representation and Reasoning (KR2022), will be held in Haifa, Israel, in July 31 - August 5, 2022.

The General Chair of KR2022 is Gerhard Lakemeyer; the Program Chairs are Gabriele Kern-Isberner and Thomas Meyer; the Local Arrangements Chair is Ofer Arieli.

We look forward to welcoming you to Haifa in 2022!