5.3.5   Editing a Field Group

A field group is used to assemble related data fields. The properties of a group element are shown in the configuration area when the element is selected.

The group properties are described in Table 23.

Table 23    Field Group Properties

Property

Description

Name

The name of the group.

Type

The type of this group. The options are:


  • Group

  • Array group

  • Map group


The different types of groups are further explained in Section 2.3.7.


(1)

Key Fields

This field is only visible when the group type is selected as Map group. It gives the identity of the field to be used as the key field for the value map group. This value is chosen from a list of the fields defined in the group.


More than one field can be chosen. These fields are combined to create a composite key for the map group.

(1)  When the Type property of the group is changed, all the data fields in the group are removed.


An array group or map group is added to the service by adding a group in the fields definition and then changing the Type property on the group to Array group or Map group. Data fields created in an array or map group cannot be moved out of the group. Data fields created outside the array or map group cannot be moved into it.

When constructing a map group, one or several Key fields must be chosen for the group, from the fields defined in the group.