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Analysis Normal Form (ANF) is a normal form intended to safely and reliably support data analysis that can be used to aggregate data created using any standard or non-standard input form or exchange mechanism.  By converting health factors into ANF statements, clinical data will be able to meet the following criteria:  Understandable, Reproducible, and Useful (URU).  This guide aims to logically explain how to convert health factors in a URU method and to standardize the health information captured within health factors.