Attribute reference logical properties

Property Type Meaning
Reference Name Enumerated type The Reference Name is the name of the object that this object is referring to. The objects available to reference can be selected from the drop-down list.
Property Type Meaning
Usage Enumerated type The usage property is used in conjunction with the Value property found in an attribute object. The default for the Usage property is optional.

Select from;

  • optional.
    • Where the Value property is set to default and no data has been entered in the Value property, the attribute can appear once and can have any value.
    • Where the Value property is set to default, the attribute can appear once. If it does not appear, its value is the data that has been entered in the Value property. If it does appear it is the value given.
    • Where the Value property is set to fixed, the attribute can appear once. If it does appear, its value must match the data that has been entered in the Value property. If it does not appear its value is the data that has been entered in the Value property.
  • prohibited. The attribute must not appear.
  • required.
    • Where the Value property is set to default and no data has been entered in the Value property, the attribute must appear once and can have any value.
    • Where the Value property is set to fixed, the attribute must appear once and it must match the data that has been entered in the Value property.
Related concepts
The message model
Related tasks
Working with message model objects
Related reference
Message model object properties
Logical properties for message model objects
Message model object properties by object