Legacy APD customization example: Customize the APD version File This example adds a value to the version file that populates the asset_tag field of the ResourceNow application record. Open the existing environment file in an XML editor. Add a new XML tag within the <version> tags, at the end of the default subservices section. The tag name is arbitrary but must not contain any spaces. This example uses <custom>, but this tag could also be named <tagNumber>. Create a nested tag inside the custom tag that names the field in the Application [cmdb_ci_appl] table you want to populate. This tag name must match the name of a field in the Application [cmdb_ci_appl] table. This example uses <asset_tag>. Add a value for this tag. This value appears in the appropriate field in the application record. Save the version file.