Well, these are not form attributes, these are url parameters. At least, according to resource descriptor document:
```yaml
create:
    doc: Creates a DRD.
    rt: drd
    links:
      self: DRDs#create
      help: Forms/create
    href: update
    parameters:
      - href: name
        ext: _create_name
      - href: leviathan_uuid
        field_type: text
      - href: leviathan_health_points
        field_type: number
        validators:
          - required
          - min: 0
          - max: 100
        sample: 42
      - href: leviathan_email
        field_type: email
        validators:
          - required
          - pattern: "^.+@.+$"
```