If you require that Digi-Key properties be mapped to properties that already exist in your database, you can use the Properties Mapping feature to have PartQuest automatically map your parts' properties to where they need to be upon download.
To set up property mapping, go to your profile page and find the Properties Mapping section. Provided that you have linked to a Dropbox account and selected a design flow, you should have access to the Edit Property Map button.
Clicking this button will activate the menu shown below.
Select Add New Property Map, fill in the mapping information, and click Done.
Repeat the process for subsequent properties. You can edit and delete the properties you have mapped using the Edit and Delete buttons shown above.