3.The formats within the brackets ( ) should be treated as a single unit. In the following figure, note option P. The format is :4!c(//4!a2!a2!c[3!c]). The ( ) brackets separates :4!c from the rest, thus implying only two sub-fields with formats 4!c and //4!a2!a2!c[3!c]. If the brackets were missed, the format //4!a2!a2!c[3!c] would not apply for a single sub-field BIC/BEI as in the figure. Instead it would imply four sub-fields with formats 4!a, 2!a, 2!c and 3!c.
4.Refer Mapping Formats with Specification (Sub-fields) to know how to perform the same using the designer.
5.A generic field always starts with a colon (:), followed by a Qualifier of format 4!c followed by zero or more sub-fields. There is no such rule for a non-generic field.
See Also:
Adding a New Generic Field
Entering an Option Specification
The specification of a field should describe the field’s format, and is given as a list of its constituent subfields. Each sub-field is separated from the next by using the ( ) brackets. For example, the format of field 95C is :4!c//2!a. As per this format, there are 2 subfields, one with format 4!c and the next with 2!a. The specification should be entered to represent these two subfields namely, Qualifier and Country Code as (Qualifier)(Country Code).
Consider the following case.
Format Pattern [A] SEPERATOR [B] SEPERATOR [C] where A, B, C
represent formats of sub-fields.
