action: /login
name: login_form
tt_template: form.tt
field_list:
    - name: user
      type: Text
      label: Username
      required: 1
      wrapper_attr:
          class: 'text label'
    - name: pass
      type: Password
      label: Password
      required: 1
      wrapper_attr:
          class: 'password label'
    - name: opt_in
      type: Checkbox
      label: Opt in?
      wrapper_attr:
          class: 'checkbox label'
    - name: submit
      type: Submit
      value: Login
      label: ~
      wrapper_attr:
          class: 'submit'