!!! Overview
An extensible match index is a type of [LDAP Indexes] that is used to help accelerate [search Responses] using an [extensible match filter|extensibleMatch]. 

Index keys are values that have been [normalized|Definition -- Normalized Value] using a specified [matchingRule], and the corresponding [ID list|Definition -- ID List] contains the [entry IDs|Definition -- Entry ID] for all entries that match the value according to that matching rule.

!! More Information
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