This is the Continuous Integration Build of FHIR (will be incorrect/inconsistent at times). 
See the Directory of published versions 
Patient Administration   Work Group | Maturity Level: N/A | Standards Status: Informative | Security Category: Business | Compartments: Device, Patient, Practitioner, RelatedPerson | 
Mappings for the Schedule resource (see Mappings to Other Standards for further information & status).
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) | Schedule | n/a | 
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