> ## Documentation Index
> Fetch the complete documentation index at: https://docs.avera.io/llms.txt
> Use this file to discover all available pages before exploring further.

# List relationship types



## OpenAPI

````yaml /api-reference/openapi.yaml get /schema/relationship-types
openapi: 3.1.0
info:
  title: Avera API
  version: 1.0.0
  description: >
    Avera ALM/PLM/QMS Platform API for regulated industries.


    ## Authentication

    All endpoints require Bearer token authentication and tenant context
    headers.


    ## Common Headers

    - `X-Tenant-ID`: Required. UUID of the current tenant.

    - `X-Branch-ID`: Required for item operations. UUID of the current branch.

    - `X-Correlation-ID`: Optional. Request correlation ID for tracing.
servers:
  - url: /api/v1
    description: API v1
security:
  - bearerAuth: []
tags:
  - name: Projects
    description: Project management operations
  - name: Items
    description: Item (requirement, design, test) operations
  - name: Branches
    description: Branch management for version control
  - name: Schema
    description: Meta-model schema operations
paths:
  /schema/relationship-types:
    get:
      tags:
        - Schema
      summary: List relationship types
      operationId: listRelationshipTypes
      responses:
        '200':
          description: List of relationship types
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/RelationshipType'
components:
  schemas:
    RelationshipType:
      type: object
      properties:
        id:
          type: string
        name:
          type: string
        description:
          type: string
          nullable: true
        forwardLabel:
          type: string
        reverseLabel:
          type: string
        sourceItemTypeIds:
          type: array
          items:
            type: string
        targetItemTypeIds:
          type: array
          items:
            type: string
        propagateSuspect:
          type: boolean
      required:
        - id
        - name
        - forwardLabel
        - reverseLabel
        - sourceItemTypeIds
        - targetItemTypeIds
        - propagateSuspect
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT

````