This book is an attempt to establish in the readers the importance of creating interoperable data stores and writing rules for handling this data. It also covers extracts from a few project dissertations and a research funded project that the author had supervised.* Describes the power of ontologies for better data management* Provides an overview of knowledge engineering including ontology engineering, tools and techniques* Provides sample development procedures for creating two domain ontologies.* Depicts the utility of ontological representation in situation awareness* Demonstrates recommendation engine for unconventional emergencies using a hybrid reasoning approach.* The text explains how to make better utilization of resources when emergency strikesGraduates and undergraduates doing courses in artificial intelligence, semantic web and knowledge engineering will find this book beneficial.