The automatic entity form (:mod:`cubicweb.web.views.autoform`)

---------------------------------------------------------------

It is possible to manage attributes/relations in the simple or multiple

* `primary`, indicates that an attribute or a relation has to be

  inserted **in the simple or multiple editing forms**. In the case of

  a relation, the related entity editing form will be included in the

  editing form and represented as a combobox. Each item of the

  combobox is a link to an existing entity.

* `secondary`, indicates that an attribute or a relation has to be

  inserted **in the simple editing form only**. In the case of a

  relation, the related entity editing form will be included in the

  editing form and represented as a combobox. Each item of the combobox

  is a link to an existing entity.

* `inlineview`, includes the target entity's form in the editing form

  of the current entity. It allows to create the target entity in the

  same time as the current entity.

* `generic`, indicates that a relation has to be inserted in the simple

  editing form, in the generic box of relation creation.

* `generated`, indicates that an attribute is dynamically computed

  or other,  and that it should not be displayed in the editing form.

`relation_category(rtype, x='subject')` to dynamically compute

a relation editing category.