Example 9 and Usefulness of nested fields.

[tirrolo]

Example 9 is not complete, as the weight is not rendered as a field. Furthermore, is it necessary to create a field for "Item"? We think it just adds confusion. Related to this: is nesting in fields really necessary?

[pmaria]

Example 9 is not complete, as the weight is not rendered as a field.

Indeed, this should be added.

Furthermore, is it necessary to create a field for "Item"? We think it just adds confusion. Related to this: is nesting in fields really necessary?

The nesting is indeed necessary. Without the nesting we will get a Cartesian product of the types and weights for items. This is precisely one of the use cases for fields.