# Manage Fields

You can use the following index actions to change field values or delete fields in IDOL Server:

DRECHANGEMETA | Changes documents’ metadata fields.
DREREPLACE | Changes documents’ field values or deletes fields.
DRETAGDOCCLUSTERS | Allows you to tag documents that are conceptually similar.

NOTE: Index actions are case sensitive. All index actions must be sent to the Distributed Index Handler DIHPort.

You can control the users that can send index actions by configuring authorization roles. See Authorization Roles Configuration Parameters.

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