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The online version of the IPEDS Glossary provides definitions for almost 500 postsecondary-related terms used in the collection and dissemination of IPEDS data.

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Term Definition Related terms
Exclusions Those students who may be removed (deleted) from a cohort (or subcohort). For the Graduation Rates, Outcome Measures , and Fall Enrollment retention rate reporting, students may be removed from a cohort if they left the institution for one of the following reasons: death or total and permanent disability; service in the armed forces (including those called to active duty); service with a foreign aid service of the federal government, such as the Peace Corps; or service on official church missions. Student Right-to-Know Act
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National Center for Education Statistics -
U.S. Department of Education