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

# Get full hierarchy reference book

> Returns full hierarchy reference book as a list of hierarchy levels



## OpenAPI

````yaml openapi/product-catalog-v1.json GET /v1/HierarchyReferenceBook
openapi: 3.0.4
info:
  title: ProductCatalog.Api 1.0
  version: '1.0'
servers:
  - url: https://{host}/product-catalog
    description: Your Lobyco environment
    variables:
      host:
        default: your-environment.lobyco.net
        description: >-
          The API host for your Lobyco environment. Replace it with the host you
          were given — this placeholder does not resolve.
security: []
paths:
  /v1/HierarchyReferenceBook:
    get:
      tags:
        - HierarchyReferenceBook
      summary: Get full hierarchy reference book
      description: Returns full hierarchy reference book as a list of hierarchy levels
      responses:
        '200':
          description: OK
          content:
            text/plain:
              schema:
                type: array
                items:
                  $ref: >-
                    #/components/schemas/ProductCatalog.Contracts.Common.HierarchyLevel
            application/json:
              schema:
                type: array
                items:
                  $ref: >-
                    #/components/schemas/ProductCatalog.Contracts.Common.HierarchyLevel
            text/json:
              schema:
                type: array
                items:
                  $ref: >-
                    #/components/schemas/ProductCatalog.Contracts.Common.HierarchyLevel
components:
  schemas:
    ProductCatalog.Contracts.Common.HierarchyLevel:
      type: object
      properties:
        depthId:
          type: integer
          description: The depth level in the hierarchy.
          format: int32
        name:
          type: string
          description: The name of the hierarchy level.
        externalDepth:
          type: integer
          description: The depth level in the external hierarchy.
          format: int32
      additionalProperties: false
      description: Represents a level in a hierarchy.

````