O*NET® Transitional Databases
Prior to the transition to the current multi-method data collection methodology featuring Job Incumbent, Occupational Expert, Big Data, and other sources, the O*NET databases from O*NET 98 to O*NET 4.0 were populated using data supplied by occupational analysts. Using earlier occupational taxonomies, analysts evaluated and refined existing Dictionary of Occupational Titles (DOT) data, then extrapolated these data to the O*NET Content Model. See:
Researchers conducting longitudinal data studies are strongly encouraged to use the O*NET 5.0 database as a starting point.
All versions of the O*NET Database are available under a Creative Commons license. See the
Database license page for more information.
O*NET 4.0
June 2002
Release of the final 'Analyst Database' with a revised database structure consistent with the OMB-approved Data Collection Program
Data Dictionary: PDF
O*NET 3.1
June 2001
Data Dictionary: PDF
O*NET 3.0
August 2000
Database classification converted to conform to the new Standard Occupational Classification (SOC) standard
Data Dictionary: PDF
O*NET 98
December 1998
Release of the original 'Analyst Database' based on the Occupational Employment and Wage Statistics (OEWS) classification
Data Dictionary: PDF
