Customizer's Guide > Merging Data from Other Sources > Configuring for Data Merge > The Data Merge Configuration File (The .dmf File) > Hiding Parameter Values
  
Hiding Parameter Values
When inserting a query, query parameters and their values are embedded in the document as part of query result. These parameters are not visible when viewing the document in Arbortext Editor, but they can be viewed when directly viewing the document’s XML source. You may wish to hide these parameter values when they represent sensitive information such as a user name or password.
To hide parameter values when queries are inserted in documents, set the parameter’s <QueryField>hidden attribute value to yes. Doing so will cause the value of the parameter to be replaced by asterisks when inserted in the document in the query result. For example:
<QueryField name="p01" hidden="yes" displayType="combo">
<Label>department</Label>
<ListItem>Engineering</ListItem>
<ListItem>Sales and Marketing</ListItem>
<ListItem>Services</ListItem>
</QueryField>