1. A system for producing structured clinical information from patient records, comprising: a computerized patient record comprising at least one data source storing patient information, at least some of the patient information being unstructured, the patient information including clinical information related to a plurality of variables representing a state of the patient; a memory comprising a domain knowledge base containing domain-specific criteria relating the clinical information to values of the variables; and a processor configured to apply a data miner for extracting the clinical information from the data source using the domain-specific criteria, the data miner operable to create structured clinical information from the extracted clinical information including at least some of the unstructured patient information, the structured clinical information including the variables representing a state of the patient as a summary, the data miner operable to resolve discrepancies of different clinical information indicating different values of one of the variables.