Fasten stores each FHIR Resource type in its own dedicated database table. As such, only the following values are acceptable for the from clause:

• Account
• AdverseEvent
• AllergyIntolerance
• Appointment
• Binary
• CarePlan
• CareTeam
• Claim
• ClaimResponse
• Composition
• Condition
• Consent
• Coverage
• CoverageEligibilityRequest
• CoverageEligibilityResponse
• Device
• DeviceRequest
• DiagnosticReport
• DocumentManifest
• DocumentReference
• Encounter
• Endpoint
• EnrollmentRequest
• EnrollmentResponse
• ExplanationOfBenefit
• FamilyMemberHistory
• Goal
• ImagingStudy
• Immunization
• InsurancePlan
• Location
• Media
• Medication
• MedicationAdministration
• MedicationDispense
• MedicationRequest
• MedicationStatement
• NutritionOrder
• Observation
• Organization
• OrganizationAffiliation
• Patient
• Person
• Practitioner
• PractitionerRole
• Procedure
• Provenance
• Questionnaire
• QuestionnaireResponse
• RelatedPerson
• Schedule
• ServiceRequest
• Slot
• Specimen
• VisionPrescription

{
  "q": {
    "select": [
      ...
    ],
    "from": "Observation",
    "where": {
      ...
    }
  }
}

As additional FHIR Resource types are added to the USCDI specification, or become commonly available by EHR systems, Fasten will support them as well.