openapi: 3.1.0
info:
  title: OSIsoft PI Web AssetServers Elements API
  description: OSIsoft PI Web API (now part of AVEVA) provides a REST interface for accessing the PI System process historian. APIs enable real-time and historical time-series data retrieval, event frame queries, asset framework hierarchy navigation, and calculated data for industrial process monitoring.
  version: 2023.2.0
  contact:
    name: AVEVA Support
    url: https://softwaresupport.aveva.com
  license:
    name: AVEVA Software License
    url: https://www.aveva.com/legal/
servers:
- url: https://{piwebapi_host}/piwebapi
  description: PI Web API server
  variables:
    piwebapi_host:
      default: piwebapi.example.com
      description: PI Web API server hostname
security:
- basicAuth: []
- kerberos: []
tags:
- name: Elements
  description: AF element management
paths:
  /assetdatabases/{webId}/elements:
    get:
      operationId: listElements
      summary: List AF elements
      description: Returns top-level AF elements in an asset database.
      tags:
      - Elements
      parameters:
      - $ref: '#/components/parameters/WebId'
      - name: nameFilter
        in: query
        schema:
          type: string
      - name: templateName
        in: query
        schema:
          type: string
      - name: maxCount
        in: query
        schema:
          type: integer
          default: 1000
      - name: selectedFields
        in: query
        schema:
          type: string
      responses:
        '200':
          description: Element list
          content:
            application/json:
              schema:
                type: object
                properties:
                  Items:
                    type: array
                    items:
                      $ref: '#/components/schemas/Element'
                  Links:
                    $ref: '#/components/schemas/PaginationLinks'
components:
  schemas:
    Element:
      type: object
      description: A PI AF element
      properties:
        WebId:
          type: string
        Id:
          type: string
          format: uuid
        Name:
          type: string
        Description:
          type: string
        Path:
          type: string
        TemplateName:
          type: string
        HasChildren:
          type: boolean
        CategoryNames:
          type: array
          items:
            type: string
    PaginationLinks:
      type: object
      properties:
        First:
          type: string
          format: uri
        Previous:
          type: string
          format: uri
          nullable: true
        Next:
          type: string
          format: uri
          nullable: true
        Last:
          type: string
          format: uri
  parameters:
    WebId:
      name: webId
      in: path
      required: true
      description: PI Web API WebId (unique opaque identifier for PI System objects)
      schema:
        type: string
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: HTTP Basic Authentication
    kerberos:
      type: http
      scheme: negotiate
      description: Kerberos/Windows Integrated Authentication