produces / producedBy

Properties expressing biosynthesis relationships where one entity generates, synthesises, secretes, or creates another. producedBy is the inverse property.

Canonical URLs: https://healthschema.org/produces, https://healthschema.org/producedBy

Namespace: hs:

Category: Biological Relationship Property

Inverse: produces ↔ producedBy

Why These Properties Exist

Understanding what produces what is fundamental to biology. Fibroblasts produce collagen, platelets produce growth factors, the liver produces bile. These production relationships are distinct from activation—they describe the creation of new substances, not the regulation of existing activities.

When marking up health content, we frequently need to state things like:

"Fibroblasts produce collagen, elastin, and hyaluronic acid"
"Sebaceous glands produce sebum"
"Collagen is produced by fibroblasts"

The produces and producedBy properties enable:

Source identification: Query "what produces collagen?" and get structured answers
Cell function documentation: List what a cell type synthesises
Treatment mechanism: Explain how therapies work by stimulating cells to produce beneficial substances
Deficiency understanding: Show why damage to a structure affects substance availability

Distinction from Regulation

This property is about creation, not regulation:

produces: "Fibroblasts make collagen" (synthesis)
stimulates: "TGF-β increases collagen production" (regulation)

Both may appear together: TGF-β stimulates fibroblasts → fibroblasts produce collagen.

Domain and Range

produces — Used On (Domain)

Type	Context
schema:AnatomicalStructure	Cells, glands, tissues that synthesise substances (fibroblasts, sebaceous glands, beta cells)
hs:BiologicalProcess	Processes that generate products (glycolysis produces ATP, inflammation produces cytokines)
schema:Protein	Enzymes that catalyse the creation of products

produces — Expected Values (Range)

Type	Context
schema:ChemicalSubstance	Hormones, lipids, signalling molecules, structural compounds
schema:Protein	Structural proteins (collagen, elastin), enzymes, growth factors
hs:BiologicalProcess	Secondary processes resulting from a primary process

producedBy — Domain and Range

The inverse property producedBy has the domain and range reversed—it's used on the substance being created, pointing to what creates it.

Relationship Semantics

Inverse Relationship

produces and producedBy are formal inverses. If A produces B, then B is producedBy A:

Statement	Equivalent Inverse
Fibroblasts produce collagen	Collagen producedBy fibroblasts
Platelets produce PDGF	PDGF producedBy platelets

Types of Production

This property covers various forms of biological production:

Biosynthesis: Cells assembling proteins from amino acids
Secretion: Glands releasing hormones or enzymes
Metabolic output: Processes generating products (e.g., ATP from glycolysis)
Enzymatic catalysis: Enzymes facilitating the creation of products

Not Transitive

If A produces B, and B produces C, it does NOT follow that A produces C. Each production relationship must be explicitly stated.

Distinction from Related Concepts

Relationship	Meaning	Example
produces	Creates, synthesises, generates	Fibroblasts produce collagen
stimulates	Increases activity or rate	TGF-β stimulates collagen synthesis
contains	Has as a component (not production)	Dermis contains collagen

Usage Guidance

Do

Use for synthesis relationships—where one entity creates or generates another
Document cell functions—list what different cell types produce
Link substances to sources—show where proteins and hormones come from
Use arrays for multiple products—cells often produce several substances
Consider bidirectional declaration—declare from both sides for complete graph traversal

Don't

Confuse with stimulates—production creates; stimulation regulates
Confuse with contains—the dermis contains collagen, but fibroblasts produce it
Use for external sources—vitamins from diet aren't "produced by" the gut (unless actually synthesised there)
Assume exclusivity—multiple cell types may produce the same substance

Choosing Between produces and producedBy

You're documenting...	Use this property	Example
A cell type or structure	`produces`	Fibroblast entity → lists what it produces
A substance or protein	`producedBy`	Collagen entity → lists what produces it
Both perspectives	Both properties	Full bidirectional declaration for graph completeness

Examples

Example 1: Cell Producing Multiple Proteins

Documenting fibroblast functions:

{
  "@type": "AnatomicalStructure",
  "@id": "#AnatomicalStructure/Fibroblast",
  "name": "Fibroblast",
  "description": "Primary connective tissue cell responsible for extracellular matrix production",
  "produces": [
    {"@id": "#Protein/Collagen"},
    {"@id": "#Protein/Elastin"},
    {"@id": "#ChemicalSubstance/HyaluronicAcid"},
    {"@id": "#Protein/Fibronectin"}
  ]
}

Why this works: Shows the full synthetic capacity of fibroblasts—essential for understanding dermal structure and regenerative treatments.

Example 2: Substance Listing Its Sources

From the perspective of the protein:

{
  "@type": "Protein",
  "@id": "#Protein/Collagen",
  "name": "Collagen",
  "sameAs": "https://www.wikidata.org/wiki/Q26868",
  "description": "Primary structural protein providing mechanical support to dermis",
  "producedBy": {"@id": "#AnatomicalStructure/Fibroblast"},
  "stimulatedBy": [
    {"@id": "#Protein/TGF-beta"},
    {"@id": "#ChemicalSubstance/VitaminC"}
  ],
  "inhibitedBy": [
    {"@id": "#ChemicalSubstance/Cortisol"},
    {"@id": "#BiologicalProcess/UVExposure"}
  ]
}

Why this works: Shows not just where collagen comes from, but what regulates its production—a complete picture useful for understanding skin ageing and treatments.

Example 3: Gland Producing Secretion

Sebaceous gland function:

{
  "@type": "AnatomicalStructure",
  "@id": "#AnatomicalStructure/SebaceousGland",
  "name": "Sebaceous gland",
  "sameAs": "https://www.wikidata.org/wiki/Q212328",
  "produces": {
    "@type": "ChemicalSubstance",
    "@id": "#ChemicalSubstance/Sebum",
    "name": "Sebum",
    "description": "Natural protective oil maintaining skin barrier function"
  },
  "description": "Oil-producing glands present throughout facial skin but absent from lip vermilion"
}

Example 4: Platelet Production

From the PRP/iPRF context:

{
  "@type": "AnatomicalStructure",
  "@id": "#AnatomicalStructure/Platelet",
  "name": "Platelet",
  "alternateName": "Thrombocyte",
  "produces": [
    {"@id": "#Protein/PDGF"},
    {"@id": "#Protein/TGF-beta"},
    {"@id": "#Protein/VEGF"},
    {"@id": "#Protein/EGF"},
    {"@id": "#Protein/IGF-1"}
  ],
  "description": "Cellular fragments containing 300+ proteins in alpha granules"
}

Why this works: Documents the growth factor payload of platelets—fundamental to explaining PRP mechanism of action.

Example 5: Bidirectional Declaration

Complete graph with both directions:

{
  "@graph": [
    {
      "@type": "AnatomicalStructure",
      "@id": "#AnatomicalStructure/Melanocyte",
      "name": "Melanocyte",
      "produces": {"@id": "#ChemicalSubstance/Melanin"}
    },
    {
      "@type": "ChemicalSubstance",
      "@id": "#ChemicalSubstance/Melanin",
      "name": "Melanin",
      "description": "Pigment providing UV protection and skin colour",
      "producedBy": {"@id": "#AnatomicalStructure/Melanocyte"}
    }
  ]
}

Example 6: Process Producing Substance

Metabolic process output:

{
  "@type": "BiologicalProcess",
  "@id": "#BiologicalProcess/Glycolysis",
  "name": "Glycolysis",
  "description": "Metabolic pathway converting glucose to pyruvate",
  "produces": [
    {
      "@type": "ChemicalSubstance",
      "@id": "#ChemicalSubstance/ATP",
      "name": "ATP",
      "description": "Primary cellular energy currency"
    },
    {
      "@type": "ChemicalSubstance",
      "@id": "#ChemicalSubstance/Pyruvate",
      "name": "Pyruvate"
    }
  ]
}

Example 7: Combined with Regulatory Properties

Showing production alongside regulation:

{
  "@graph": [
    {
      "@type": "AnatomicalStructure",
      "@id": "#AnatomicalStructure/Fibroblast",
      "name": "Fibroblast",
      "produces": {"@id": "#Protein/Collagen"},
      "stimulatedBy": {"@id": "#Protein/PDGF"}
    },
    {
      "@type": "Protein",
      "@id": "#Protein/PDGF",
      "name": "Platelet-derived growth factor",
      "stimulates": {"@id": "#AnatomicalStructure/Fibroblast"},
      "producedBy": {"@id": "#AnatomicalStructure/Platelet"}
    },
    {
      "@type": "Protein",
      "@id": "#Protein/Collagen",
      "name": "Collagen",
      "producedBy": {"@id": "#AnatomicalStructure/Fibroblast"}
    }
  ]
}

Why this works: Shows the complete chain: platelets produce PDGF → PDGF stimulates fibroblasts → fibroblasts produce collagen. Each relationship is explicit and queryable.

Implementation Notes

Graph Queries

Example SPARQL queries enabled by this property:

Find all producers of collagen:

SELECT ?producer ?name WHERE {
  ?producer hs:produces <#Protein/Collagen> .
  ?producer schema:name ?name .
}

Find what fibroblasts produce:

SELECT ?product ?name WHERE {
  <#AnatomicalStructure/Fibroblast> hs:produces ?product .
  ?product schema:name ?name .
}

Build a production network:

SELECT ?producer ?product WHERE {
  ?producer hs:produces ?product .
  ?producer a schema:AnatomicalStructure .
}

JSON-LD Processing

In the Health Schema context, both properties are defined with @type: @id, meaning values should be references to other entities rather than literal strings.

Validation

Standard schema.org validators will not recognise these properties. This is expected for Health Schema extensions. The properties are defined in the Health Schema context.