This document covers the data terms used in the "Australian Vocational Education and Training Statistics: Apprentices and Trainees--Early Trend Estimates December 2010" publication. The primary purpose of this document is to assist users of the report to understand the specific data terms used within it. Terms that appear in the report are listed in alphabetical order with the following information provided for each: (1) Definition: a brief explanation of the term; (2) Classification categories: defined categories that apply to each term are listed where applicable; and (3) Source: a description of the source of this information, including details of any calculations or derivations. Unless stated otherwise, all data are sourced from the national Apprentice and Trainee Collection. [For the main document, "Apprentices and Trainees: Early Trend Estimates. December Quarter 2010", see ED516359.]