The resources here provide a mix of guidance, templates and examples to help data coordinators. You can read more about the process in the blog post, 5 Ways to Scale the Mountain of Data in Your Organization.
The dataset inventory provides a list of data maintained by departments and is collected in accordance with Chapter 22D of the Administrative Code. Additionally, when data can be published to the portal, a link to the public dataset is made available in that inventory. Data Coordinators, appointed by their departments, are responsible for annual inventory updates.