The Dataform field access block provides context and settings for Dataform field access rules. With such rules you can allow or prevent particular users (individually or by role) access to particular fields in particular views.

There can be many interesting applications of the field rules. For instance, you can create a Dataform activity where a student submit an assignment (online text, file upload, etc.) and two graders evaluate the submission. The graders enter their evaluations in designated fields in the student entry. By the field rules, you can prevent the student from updating the grading fields, and prevent the graders from updating the submission fields. You can also prevent the graders from seeing each other's evaluation.