8. One or more non-transitory computer-storage media having computer executable instructions embodied thereon that when executed by a computer perform for performing a method of searching an electronic medical record for clinical concepts, the method comprising: receiving a search query that includes a clinical concept from a user to search the electronic medical record, wherein the clinical concept is an aspect related to a person's health, wherein the electronic medical record is associated with a patient, and wherein the electronic medical record includes a plurality of electronic documents that describe a medical history for the patient and is stored on the computer-storage media; identifying one or more uses of the clinical concept in the electronic medical record, wherein a use of a clinical concept is a single occurrence of the clinical concept within the electronic medical record, wherein the documents in the electronic medical record describe the patient's medical history, and wherein the electronic medical record is stored on the computer-storage media; determining a clinical-importance score for each of the one or more uses of the clinical concept, wherein the clinical-importance score quantifies how important each use of the clinical concept is likely to be to the user querying the electronic medical record, and wherein the clinical-importance score is calculated based on the use of the clinical concept within the electronic medical record and without reference to any specific search query; determining at least one boost factor for each of the one or more uses of the clinical concept, wherein the at least one boost factor is based on the search query and the user, wherein the at least one boost factor includes a role-boost factor, wherein each role-boost factor is based on a role of the user that submitted the search query and a role of a person that generated the particular use of the clinical concept in the electronic medical record, and wherein the particular role-boost factor is increased when the role of the user is in the same category as the role of the person associated with the use of the clinical concept within the electronic medical record; calculating a query-responsiveness score for each document within the electronic medical record in which the clinical concept is used by combining the one or more clinical-importance scores with the one or more boost factors; and presenting search results based on the query-responsiveness score associated with each said document within the electronic medical record in which the one or more uses of a clinical concept was identified, wherein the search results are displayed ordered according to the query-responsiveness score.
8. One or more non-transitory computer-storage media having computer executable instructions embodied thereon that when executed by a computer perform for performing a method of searching an electronic medical record for clinical concepts, the method comprising: receiving a search query that includes a clinical concept from a user to search the electronic medical record, wherein the clinical concept is an aspect related to a person's health, wherein the electronic medical record is associated with a patient, and wherein the electronic medical record includes a plurality of electronic documents that describe a medical history for the patient and is stored on the computer-storage media; identifying one or more uses of the clinical concept in the electronic medical record, wherein a use of a clinical concept is a single occurrence of the clinical concept within the electronic medical record, wherein the documents in the electronic medical record describe the patient's medical history, and wherein the electronic medical record is stored on the computer-storage media; determining a clinical-importance score for each of the one or more uses of the clinical concept, wherein the clinical-importance score quantifies how important each use of the clinical concept is likely to be to the user querying the electronic medical record, and wherein the clinical-importance score is calculated based on the use of the clinical concept within the electronic medical record and without reference to any specific search query; determining at least one boost factor for each of the one or more uses of the clinical concept, wherein the at least one boost factor is based on the search query and the user, wherein the at least one boost factor includes a role-boost factor, wherein each role-boost factor is based on a role of the user that submitted the search query and a role of a person that generated the particular use of the clinical concept in the electronic medical record, and wherein the particular role-boost factor is increased when the role of the user is in the same category as the role of the person associated with the use of the clinical concept within the electronic medical record; calculating a query-responsiveness score for each document within the electronic medical record in which the clinical concept is used by combining the one or more clinical-importance scores with the one or more boost factors; and presenting search results based on the query-responsiveness score associated with each said document within the electronic medical record in which the one or more uses of a clinical concept was identified, wherein the search results are displayed ordered according to the query-responsiveness score. 9. The media of claim 8 , wherein the method further includes: determining a clinical-usage context for each use of the clinical concept in the electronic medical record, wherein the clinical-usage context describes how the clinical concept was used in each document of the electronic medical record; determining a truth status for each use of the clinical concept in the electronic medical record, wherein the truth status indicates whether the clinical concept was expressed in as one of positively, negatively, ambiguously, and unknown; and wherein the clinical-importance score for said each of the one or more uses of the clinical concept is based on the clinical-usage context and the truth status for said each of the one or more uses of the clinical concept.