| Description: The nil_reason attribute provides the permissible values allowed as reasons when an attribute assigned a nil value. |
| Namespace Id: pds | Steward: ops | Class Name: Symbolic_Literals_PDS | Type: ASCII_Short_String_Collapsed |
| Minimum Value: None | Maximum Value: None | Minimum Characters: 1 | Maximum Characters: 255 |
| Unit of Measure Type: None | Default Unit Id: None | Attribute Concept: None | Conceptual Domain: Short_String |
| Status: Active | Nillable: false | Pattern: None |
| Permissible Value(s) | Value | Value Meaning |
| | anticipated | The value is temporarily not available. |
| | inapplicable | There is no value. |
| | missing | The correct value is not readily available to the sender of this data. However, a correct value probably exists. |
| | unknown | The correct value is not readily available to the sender of this data. Furthermore, a correct value may not exist. |