The Restriction for the custom overview (see Custom overviews) is defined as a Field restriction as shown on the right:

• The Check value (left) is obtained via a Typed attribute projection with the following parameters:
  
  

  • A Property projection to the address property of the user account must be configured here as the Attribute owner path, as Users themselves (by default, see Custom type definitions) cannot have any indicator attributes.

  • The attribute type 'Flag attribute' (FlagAttribute) is selected in the Attribute parameter.
    
    

  • The Flag type VIP is selected as the Type, i.e. the 'feature' that the restriction is aimed at.
    
    

  • The 'payload' in the flag attribute is the 'Flag value' (flagValue) property, which is therefore selected here as Property.
    
    

• The Compare value (right) is determined as a static value directly via a Boolean value. A match (==) with the value true should be present here so that a user is listed in the overview.

Click on the Add column button to create a new Custom column whose Projection can be configured as shown on the right:

• Each instance of the plural text attribute with the subtype 'Container No' (CONTAINER_NO) defines exactly one 'Container number' as a character string via its text value (textValue). As the column should display one shipment per line in the context of a Shipment overview, a Collection projection is used that summarizes all container numbers per shipment as a list value.
  
  

• The Typed attribute resolver with the following configuration is used as the Collection projection:
  

  • The attribute type 'Text attribute' is selected as the Attribute.
    
    

  • The Text type 'Container No' (CONTAINER_NO) can then be selected as the Type.
    
    

  • The 'Text' (textValue) property is selected for the Property parameter, which is typically the decisive characteristic of the text attribute.

The screenshot on the right shows sample data for the output of container numbers in the column labeled 'Container':

• The list of text values supplied by the Collection projection is automatically formatted for output as a column in the format [<Eintrag>, <Eintrag>, ... ], because this corresponds to the string image of a list.
  
  

• As the example shows, a filter expression for the text (here: '___U%') acts as a criterion for list entries from the Collection projection. Specifically, here only Shipmentsfor which at least one 'Container number' in the fourth position contains the letter 'U' appear in the list.

The Label expression shown on the right uses the $replace() function with a regular expression(^.(.*).$) to eliminate the first and last character – i.e. the square brackets ([]) that are not always desired in the output – by replacement.