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"errorMessage": "ERROR: Annotation has multiple generated key values or a single generated key value that is not of format date-time.",
"title": "If present the Annotation-level **_generated_ key** has a **single value** that is of **format date-time** - [model 3.3.1](https://www.w3.org/TR/annotation-model/#lifecycle-information)",
"description": "True when no Annotation generated key present or when generated key has a single value that is of format date-time (Section 3.3.1)",