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# Change Document Metadata

The `DRECHANGEMETA` index action instructs the DIH to change the values of the importance rating, database, index date, or expiration date for specific documents in its child IDOL Servers.

Use the following action syntax:

    http://DIHhost:IndexPort/DRECHANGEMETA?Type=metadataField&Refs=docReferences&NewValue=value

When you send this action to the DIH instead of to an IDOL server, note:

- `DIHhost` is the IP address (or name) of the machine on which the DIH is installed, and `IndexPort` is the number of the port that you use to send index actions to the DIH.
- This action allows you to specify documents by either document reference or document ID. However, unless the child IDOL servers are all identical, you must specify documents by reference only, not by document ID. Because dissimilar documents in different databases can have the same document ID, using document IDs with this action can have unintended consequences.
- This action also allows you to change the database that you assign a document to. If the child IDOL servers do not all have identical databases, this action can have unintended consequences.

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