Set Option: Object type attribute.
Specifies whether users are required to fill in certain fields prior to transitioning an object of the given type to a static state. If one of the required fields is missing or contains an illegal value, the object will not transition to the static state.
The contents of this attribute should be the name of the required attributes, one per line. For example, if you want release, task description and priority to be required fields on a task, you should specify:
release
task_description
priority
The task will not be able to be completed unless the attributes specified each have a valid value.
The default is an empty string.
For information about how to set object type attribute options, see Setting object type attribute options.