Definition: Crosswalks establish how values in one system are transformed into values in another system.

What This Means: The last name, first name, middle initial, birth date, and gender fields as defined in one application’s database must be crosswalked to the first name, middle name, last name, gender, date of birth fields in another when data are shared. Legacy systems are seldom changed to match a new data format. Instead a crosswalk table is built to change the legacy system’s layout around to match the new format.


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