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Principles of Knowledge Representation and Reasoning Incorporated KRInc. is a not for profit Scientific Foundation incorporated in the state of Massachusettsof the United States of America concerned with fostering research andcommunication on knowledge representation and reasoning. Its primary activities include organizing a series of prestigious conferences theconferences on Principles of Knowledge Representation and Reasoningcooperating with workshops on related topics maintaining informationalmaterials on the World Wide Web and maintainingKRrelated community resources. Announcements The 22nd International Conference on Principles of Knowledge Representation and ReasoningKR 2025 will be held in Melbourne Australia 2025.