# Assign a Value from a Data View Assigning a value from a data view is very similar to assigning a value from the coverage matrix view. In the example below, we are assigning the external account number for the payment transaction from the 'external\_view' to the field 'crediting\_account'. Click on the field name in the center pane, click the plus to create the rule, click on the rule name to open the bottom panes, and click on 'Compose' in the 'Operands pane to open the Rule window. In the left pane ('Sources') click on the view that the data is store in ('external\_view'). In the center pane, click on the field 'account\_number', and the click the blue plus sign in the right pane to apply this rule.

Click on the 'Save' button in the bottom right of this window to save the rule.

--- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.apica.io/platform-docs/test-data-orchestrator-tdo/user-documentation/tdo-project-builder-user-guide/data-assignment/assign-a-value-from-a-data-view.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.