</> Web Validators

Full Schema Hierarchy

Browse every schema.org type: what it inherits from, what inherits from it, and every property it accepts.

Built from schema.org's own machine-readable release -- 939 types and 1538 properties, version 30.1 -- and served from a committed copy, so it works whether or not schema.org is reachable. Each property is shown with the type it was declared on, which is the part that is hard to see on the official hierarchy page.

Based on: Schema.org · Schema.org — Full Hierarchy

About this validation

Browses the schema.org type hierarchy from a committed copy of schema.org's own machine-readable release: supertypes, subtypes, and the properties a type accepts including everything it inherits.

Rules reviewed:
Nov 15, 2026

SEOTechTests methodology: Serves schema.org's type hierarchy from a copy of its own machine-readable release that is generated by a script in this repository and committed, so the page never depends on schema.org being reachable. Supertypes are flattened breadth-first, and the property list for a type is everything declared on it plus everything inherited.

Standards and vendor-documented behavior can change. This reflects the source as last reviewed above, not a permanent guarantee.

MedicalSymptom

Any complaint sensed and expressed by the patient (therefore defined as subjective) like stomachache, lower-back pain, or fatigue.

schema.org/MedicalSymptom38 properties0 subtypesin the health-lifesci area, not the core vocabulary

Inheritance

Thing→MedicalEntity→MedicalCondition→MedicalSignOrSymptom→MedicalSymptom

Properties declared on MedicalSymptom (0)

MedicalSymptom declares no properties of its own -- everything it accepts is inherited.

Inherited properties (38)

additionalTypefrom ThingText, URLAn additional type for the item, typically used for adding more specific types from external vocabularies in microdata syntax.
alternateNamefrom ThingTextAn alias for the item.
associatedAnatomyfrom MedicalConditionAnatomicalStructure, AnatomicalSystem, SuperficialAnatomyThe anatomy of the underlying organ system or structures associated with this entity.
causefrom MedicalConditionMedicalCauseThe cause of a medical condition.
codefrom MedicalEntityMedicalCodeA medical code for the entity, taken from a controlled vocabulary or ontology such as ICD-9, DiseasesDB, MeSH, SNOMED-CT, RxNorm, etc.
descriptionfrom ThingText, TextObjectA description of the item.
differentialDiagnosisfrom MedicalConditionDDxElementOne of a set of differential diagnoses for the condition.
disambiguatingDescriptionfrom ThingTextA sub property of description.
drugfrom MedicalConditionDrugSpecifying a drug or medicine used in a medication procedure.
epidemiologyfrom MedicalConditionTextThe characteristics of associated patients, such as age, gender, race etc.
expectedPrognosisfrom MedicalConditionTextThe likely outcome in either the short term or long term of the medical condition.
fundingfrom MedicalEntityGrantA Grant that directly or indirectly provide funding or sponsorship for this item.
guidelinefrom MedicalEntityMedicalGuidelineA medical guideline related to this entity.
identifierfrom ThingPropertyValue, Text, URLThe identifier property represents any kind of identifier for any kind of Thing, such as ISBNs, GTIN codes, UUIDs etc.
imagefrom ThingImageObject, URLAn image of the item.
legalStatusfrom MedicalEntityDrugLegalStatus, MedicalEnumeration, TextThe drug or supplement's legal status, including any controlled substance schedules that apply.
mainEntityOfPagefrom ThingCreativeWork, URLIndicates a page (or other CreativeWork) for which this thing is the main entity being described.
medicineSystemfrom MedicalEntityMedicineSystemThe system of medicine that includes this MedicalEntity, for example 'evidence-based', 'homeopathic', 'chiropractic', etc.
namefrom ThingTextThe name of the item.
naturalProgressionfrom MedicalConditionTextThe expected progression of the condition if it is not treated and allowed to progress naturally.
ownerfrom ThingOrganization, PersonA person or organization who owns this Thing.
pathophysiologyfrom MedicalConditionTextChanges in the normal mechanical, physical, and biochemical functions that are associated with this activity or condition.
possibleComplicationfrom MedicalConditionTextA possible unexpected and unfavorable evolution of a medical condition.
possibleTreatmentfrom MedicalSignOrSymptomDrug, DrugClass, LifestyleModification, MedicalTherapyA possible treatment to address this condition, sign or symptom.
potentialActionfrom ThingActionIndicates a potential Action, which describes an idealized action in which this thing would play an 'object' role.
primaryPreventionfrom MedicalConditionMedicalTherapyA preventative therapy used to prevent an initial occurrence of the medical condition, such as vaccination.
recognizingAuthorityfrom MedicalEntityOrganizationIf applicable, the organization that officially recognizes this entity as part of its endorsed system of medicine.
relevantSpecialtyfrom MedicalEntityMedicalSpecialtyIf applicable, a medical specialty in which this entity is relevant.
riskFactorfrom MedicalConditionMedicalRiskFactorA modifiable or non-modifiable factor that increases the risk of a patient contracting this condition, e.g.
sameAsfrom ThingURLURL of a reference Web page that unambiguously indicates the item's identity.
secondaryPreventionfrom MedicalConditionDrug, DrugClass, LifestyleModification, MedicalTherapyA preventative therapy used to prevent reoccurrence of the medical condition after an initial episode of the condition.
signOrSymptomfrom MedicalConditionMedicalSignOrSymptomA sign or symptom of this condition.
stagefrom MedicalConditionMedicalConditionStageThe stage of the condition, if applicable.
statusfrom MedicalConditionEventStatusType, MedicalStudyStatus, TextThe status of the study (enumerated).
studyfrom MedicalEntityMedicalStudyA medical study or trial related to this entity.
subjectOffrom ThingCreativeWork, EventA CreativeWork or Event about this Thing.
typicalTestfrom MedicalConditionMedicalTestA medical test typically performed given this condition.
urlfrom ThingURLURL of the item.

FAQ

Where does this hierarchy come from?

From schema.org's published machine-readable vocabulary, condensed to the type and property relations and committed to this site. The release version it was built from is shown with the results.[1, 2]

Why does a type list properties it does not declare?

Because it inherits them. Every type ultimately descends from Thing, so name, url, description and image are available everywhere without being declared on each type.[1]

What do pending and attic mean next to a type?

schema.org keeps proposed terms in a pending area before they join the core vocabulary, and moves retired ones to an attic so old markup still resolves. A term in either is real, but not part of the core vocabulary.[1]