The logical properties of a local
group include properties that specify the number of occurrences of
the local group.
Valid children in a local group that depend on both Composition and Content
Validation are shown in MRM content validation.
| Property |
Type |
Meaning |
| Composition |
Enumerated type |
Define the order, and the number of occurrences,
of the elements and groups in your messages. Composition does not affect the
attributes in a complex type.
Select from the following options:
- Empty
- sequence. If you
select this option, you can define members that are elements or groups.
These members, if present, must appear in the specified order in the
message. They can repeat, and the same element or group can appear
more than once.
- choice. If you select
this option, you can define members that are elements or groups. Exactly
one of the defined members must be present in the message, and can
repeat.
Use this option if you want to model C unions and COBOL
REDEFINES in a Custom Wire Format, or an XML DTD element that uses
choice in an XML Wire Format, or a SWIFT field that has more than
one option.
- all. If you select
this option, you can define members that are elements; groups are
not allowed. The elements in an all group
can appear in any order. Each element can appear once, or not at all.
An all group can be
used only at the top level of a complex type; it cannot be a member
of another group within a type.
- unorderedSet.
This
option is supported only by the MRM domain.
If you select this
option, you can define members that are elements. The elements can
repeat, but the same element cannot appear twice in the list of members.
The elements can appear in any order in the message.
- orderedSet.
This
option is supported only by the MRM domain.
If you select this
option, you can define members that are elements. The elements can
repeat, but the same element cannot appear twice in the list of members.
The elements must appear in the specified order in the message.
- message.
This
option is supported only by the MRM domain.
If you select this
option, you can define only messages as members. Each member can repeat,
but the same message cannot appear twice in the list of members. Like choice, only one of the defined
members can be present in a message.
Unlike choice, when writing a message,
if the complex type or group has more than one member, the bit stream
is not padded to the length of the longest member.
Use this
option to model multipart messages, which are used in some industry
standards; for example, SWIFT. For more information, see the section
on multipart messages in Message Sets: Multipart messages.
|
| Content Validation |
Enumerated type |
Content Validation is
used only by the MRM domain. If validation is enabled in your message
flow, Content Validation specifies
the strictness of the MRM validation for members of a complex type
or group. See MRM content validation for
further details.
Select from the following options:
- Closed. The complex
type can only contain the child elements that you have added to it.
- Open Defined. The
complex type can contain any valid element defined within the message
set.
- Open. The complex
type can contain any valid element, not just those that you have added
to this complex type.
See Message Sets: Combinations of Composition and Content Validation for
further details of these options.
|
Occurrences
| Property |
Type |
Meaning |
| Min Occurs |
Integer |
Specify the minimum number of times that the object can repeat. The
default value is 1.
If the value is set to 0,
the object is optional.
With the exception of Max Occurs being set to -1, if a value is set for Min Occurs, it must be less than
or equal to the value in Max Occurs.
|
| Max Occurs |
Integer |
Specify
the maximum number of times that the object can repeat. The default
value is 1. If this
property is not set, the object cannot occur more than once.
If
this property is set to 0,
it is interpreted as if the object does not exist in the message.
It
can also be set to -1,
to indicate that the limit is unbounded and there is no maximum to
the number of occurrences.
|