A set of data elements that are required to be collected and reported by all HMIS-participating programs to ensure consistency and comparability of data across different programs and systems. These data elements include date of birth, gender, race, ethnicity, veteran`s status, and Social Security Number (SSN). These elements are needed for CoCs to understand the basic dynamics of homelessness in their community and for HUD to meet the Congressional directive to support the LSA (Longitudinal Systems Analysis).