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**Table of Contents**

- [Reference: Available Ontologies in Marketplace](#reference-available-ontologies-in-marketplace)
  - [General Purpose](#general-purpose)
    - [Schema.org](#schemaorg)
    - [DBpedia](#dbpedia)
  - [Metadata & Documentation](#metadata--documentation)
    - [Dublin Core](#dublin-core)
    - [MIAOU (Metadata Infrastructure for Audiovisual Objects)](#miaou-metadata-infrastructure-for-audiovisual-objects)
  - [Social & People](#social--people)
    - [FOAF (Friend of a Friend)](#foaf-friend-of-a-friend)
  - [Domain-Specific](#domain-specific)
    - [SKOS (Simple Knowledge Organization System)](#skos-simple-knowledge-organization-system)
    - [BioOntology](#bioontology)
    - [GEO](#geo)
    - [VCARD](#vcard)
  - [E-Commerce (Curated)](#e-commerce-curated)
    - [ecommerce-ontology](#ecommerce-ontology)
    - [inventory-ontology](#inventory-ontology)
  - [Healthcare](#healthcare)
    - [HL7 FHIR](#hl7-fhir)
  - [Publishing & Content](#publishing--content)
    - [DCAT](#dcat)
    - [CIDOC-CRM](#cidoc-crm)
  - [Installation Tips](#installation-tips)

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# Reference: Available Ontologies in Marketplace

Popular ontology packs available for code generation.

## General Purpose

### Schema.org
The most comprehensive general vocabulary with 788+ classes.

```bash
ggen ontology install schema-org
```

**Details**:
- Classes: 788+
- Properties: 2,500+
- Domains: All (e-commerce, articles, events, health, etc.)
- Languages: TypeScript, Rust, Python, Go, Java, C#
- Rating: ⭐⭐⭐⭐⭐ (2,340 votes)
- Downloads: 45.2K

**Key Classes**: Product, Article, Person, Organization, Event, Place

### DBpedia
Structured data from Wikipedia with billions of instances.

```bash
ggen ontology install dbpedia
```

**Details**:
- Classes: 700+
- Properties: 4,000+
- Focus: Knowledge base, entities
- Rating: ⭐⭐⭐⭐ (890 votes)

## Metadata & Documentation

### Dublin Core
Standard metadata vocabulary for library and document management.

```bash
ggen ontology install dublin-core
```

**Details**:
- Classes: 35
- Properties: 50+
- Focus: Document metadata
- Rating: ⭐⭐⭐⭐⭐ (1,200 votes)

**Key Properties**: Creator, Date, Subject, Title, Type

### MIAOU (Metadata Infrastructure for Audiovisual Objects)
Metadata for video and audio content.

```bash
ggen ontology install miaou
```

## Social & People

### FOAF (Friend of a Friend)
Social network and person/organization vocabulary.

```bash
ggen ontology install foaf
```

**Details**:
- Classes: 35+
- Properties: 60+
- Focus: Social networks, people
- Rating: ⭐⭐⭐⭐ (1,100 votes)

**Key Classes**: Person, Organization, Project

## Domain-Specific

### SKOS (Simple Knowledge Organization System)
Vocabulary for knowledge organization and taxonomies.

```bash
ggen ontology install skos
```

### BioOntology
Biological and medical terms and concepts.

```bash
ggen ontology install bio-ontology
```

### GEO
Geographic data and spatial relationships.

```bash
ggen ontology install geo
```

### VCARD
Contact and organization information.

```bash
ggen ontology install vcard
```

## E-Commerce (Curated)

### ecommerce-ontology
Pre-composed pack with Schema.org + Dublin Core for shopping.

```bash
ggen ontology install ecommerce-ontology
```

**Includes**: Product, Offer, Order, PaymentMethod, ShippingMethod

### inventory-ontology
Inventory management and supply chain.

```bash
ggen ontology install inventory-ontology
```

## Healthcare

### HL7 FHIR
Fast Healthcare Interoperability Resources standard.

```bash
ggen ontology install hl7-fhir
```

## Publishing & Content

### DCAT
Data Catalog Vocabulary for data portals.

```bash
ggen ontology install dcat
```

### CIDOC-CRM
Cultural Heritage and Museum ontology.

```bash
ggen ontology install cidoc-crm
```

## Installation Tips

List all available packs:
```bash
ggen ontology discover --limit 100
```

Check pack details before installing:
```bash
ggen ontology info schema-org --verbose
```

Search for specific domain:
```bash
ggen ontology discover --domain ecommerce --limit 20
```

View installed packs:
```bash
ggen ontology list --installed
```
