1
Conditional
Object is conditional.
2
Mandatory
Object is mandatory.
3
Optional
Object is optional.
4
Floating
Object is floating, not at a pre-defined position within a message.
5
Not used
Object is not used.
6
Required
Object is required.
7
Advised
Object use is advised.
8
Not advised
Object use is not advised.
9
Dependent
Object use is dependent upon an additional condition or criteria.
10
Default value
Value to be used when no other value is specified.
11
Preferred
The value is preferred.