| Code | Display | Definition |
| RULES_UNAVAILABLE |
Rules unavailable |
No readable rule corpus is available for the applicable catalog scope. |
| RULESET_STALE |
Ruleset stale |
The available ruleset is outside its accepted freshness or effective-period contract. |
| RULESET_PARTIAL |
Ruleset partial |
The available ruleset declares partial structured coverage. |
| RULESET_UNSUPPORTED |
Ruleset unsupported |
The ruleset schema or semantic version is unsupported. |
| RULE_CLASS_UNSUPPORTED |
Rule class unsupported |
The evaluator does not support the declared rule class semantic major. |
| RULE_PARAMETER_UNSUPPORTED |
Rule parameter unsupported |
The evaluator does not support a declared must-understand parameter. |
| SOURCE_COVERAGE_INCOMPLETE |
Source coverage incomplete |
The source manifest declares a must-understand structured or prose coverage gap. |
| SERVICE_DATE_UNRESOLVED |
Service date unresolved |
No unambiguous ruleset version can be resolved for the service date. |
| REQUIRED_FACT_NOT_SUPPLIED |
Required fact not supplied |
The caller did not supply a fact required by the rule. |
| REQUIRED_FACT_SOURCE_UNAVAILABLE |
Required fact source unavailable |
The source needed to determine a required fact is unavailable. |
| RULE_VIOLATION |
Rule violation |
The evaluated facts violate the declared rule. |
| RULE_REQUIREMENT_UNMET |
Rule requirement unmet |
A declared approval, agreement, companion, documentation, or other requirement is unmet. |
| RULE_ADVISORY |
Rule advisory |
The rule produced a non-blocking advisory result. |
