Emergency information sharing between government entities and policy and decision makers is possible by the presence of centralized disaster knowledge stores. The knowledge stored in this store should be represented in a format that allows easy exchange of information between different parties involved. If the knowledge is exchangeable in real time, the speed and quality of the coordinated response increases. In order to free up data from storage in isolated silos and to enable machines to understand and interpret the meaning of information, we must set up a network of links between structured data. Semantic data models and semantic repositories are a solution for this. This chapter explains the process of creating knowledge stores for two disasters under study, namely earthquake and terrorism. Each domain-specific centralized knowledge store comprises a domain ontology, a case base of history cases, a rule base of expert knowledge, and required common procedures according to the use case scenario.