Administrator User Guide

Multiwrite Databases and Extracts : Using Extracts : Claiming
When a user working on an extract database creates or modifies an element, it is claimed out to the extract. This is known as an extract claim. Once an element is claimed to an extract, user claims are made in the same way as in any other multiwrite database.
The EXTRACT CLAIM command works up through the extract levels, claiming as necessary: the user does not need to claim each level of extract separately. For example, consider the following three-level extract:

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