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curl -X GET "https://api.omophub.com/v1/concepts/201826/relationships/options" \
  -H "Authorization: Bearer YOUR_API_KEY"

{
  "success": true,
  "data": {
    "concept_id": 201826,
    "available_relationships": [
      {
        "id": "Is a",
        "name": "Is a"
      },
      {
        "id": "Maps to",
        "name": "Maps to"
      },
      {
        "id": "Mapped from",
        "name": "Mapped from"
      },
      {
        "id": "Subsumes",
        "name": "Subsumes"
      }
    ]
  },
  "meta": {
    "request_id": "req_relationship_options_123",
    "timestamp": "2024-12-22T10:00:00Z",
    "vocab_release": "2025.1"
  }
}

​
Overview

This endpoint returns all available relationship types that exist for a specific concept. This is useful for building dynamic UI components like dropdowns and understanding what relationships are available for a concept.

​
Path Parameters

​
conceptId
integer
required
The unique OMOP concept ID to get relationship options for

​
Query Parameters

​
vocab_release
string
Specific vocabulary release version (e.g., “2025.1”)

​
Response

​
success
boolean
required
Indicates whether the request was successful
​
data
object
required
Response data containing relationship options
​
meta
object
required
Response metadata
curl -X GET "https://api.omophub.com/v1/concepts/201826/relationships/options" \
  -H "Authorization: Bearer YOUR_API_KEY"

{
  "success": true,
  "data": {
    "concept_id": 201826,
    "available_relationships": [
      {
        "id": "Is a",
        "name": "Is a"
      },
      {
        "id": "Maps to",
        "name": "Maps to"
      },
      {
        "id": "Mapped from",
        "name": "Mapped from"
      },
      {
        "id": "Subsumes",
        "name": "Subsumes"
      }
    ]
  },
  "meta": {
    "request_id": "req_relationship_options_123",
    "timestamp": "2024-12-22T10:00:00Z",
    "vocab_release": "2025.1"
  }
}

​
Usage Examples

​
Basic Relationship Options

Get all available relationship types for a concept: 
curl -X GET "https://api.omophub.com/v1/concepts/201826/relationships/options" \
  -H "Authorization: Bearer YOUR_API_KEY"

​
With Specific Vocabulary Version

Get relationship options for a specific vocabulary release: 
curl -X GET "https://api.omophub.com/v1/concepts/201826/relationships/options?vocab_release=2025.1" \
  -H "Authorization: Bearer YOUR_API_KEY"

​
UI Dropdown Integration

Use in a dropdown component: 
async function loadRelationshipOptions(conceptId) {
  const response = await fetch(`/v1/concepts/${conceptId}/relationships/options`, {
    headers: { 'Authorization': 'Bearer YOUR_API_KEY' }
  });
  const result = await response.json();

  return result.data.available_relationships.map(rel => ({
    value: rel.id,
    label: rel.name
  }));
}

// Use in UI
const options = await loadRelationshipOptions(201826);
const selectHtml = options.map(opt =>
  `<option value="${opt.value}">${opt.label}</option>`
).join('');

​
Important Notes

  • Dynamic options - Available relationship types vary by concept
  • Both directions - Returns relationships where the concept is either source or target
  • Valid only - Only returns relationships with valid (non-deprecated) status