Who may enter data into Struct Schemas depends on the set permissions.

By default data in schemas is editable by everyone. This can be restricted by filling in the “editors” at the bottom of the Schema Editor. Editors can be given as username or @-prefixed group names. Multiple entries can be separated by commas.

User who want to edit Page Schemas also need at least write permission for the associated page.

Superuser can always edit Struct data.