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# Define a DFE chain

This topic describes how to create DFE chains, containing a sequence of DFEs.

For general information, see DFE chains.

Applies to:

- Web - HTTP/HTML Vuser scripts

- SAP - Web Vuser scripts

In this topic:

## Add a DFE chain

1. In VuGen, open the Vuser script.

2. Click Record > Recording Options > Data Format Extension > Chain Configuration.

   For details on the dialog box options, see Data format extension > Chain configuration recording options.

3. Under Chains, click the New Chain button and create a new chain. The new chain is listed in the Chains pane.

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## Add DFEs to the new DFE chain

1. In the Chains pane, select the chain to which you want to add DFEs.

2. In the Chain: <chain name> pane, click the Add DFE button . For details on the Chain: <chain name> pane, see Data format extension > Chain configuration recording options.

3. In the Add Data Format Extension dialog box, select the DFE that you want to add to the chain and click OK.

   When you add the GWT DFE or the Prefix Postfix DFE to a chain, you must supply additional configuration details about the DFE. For more information, see the documentation about the specific DFE.

4. After you add a DFE to the chain, select the appropriate option from the Continue Processing list. For details on the Continue Processing option, see Data format extension > Chain configuration recording options.

5. Add additional DFEs to the chain as required.

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Next steps:

- Enable and configure DFE support

See also:

- Data format extensions (DFEs) overview

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