Deploying to two different tables without access to primary key

System

I have two tables to which I want to deploy metadata using DataDeploy:

content:
id (primary key)
path (unique)

content_metadata:
id (primary key)
content_id (references content(id))
value

I want to create/update the records without having to explicitly specify content(id). Is it possible to have DataDeploy look up the content record using the path, then plug that id into the row to be inserted into the content_metadata table?

Thanks,
Dhruva