title: RelativityOne Vocabulary
description: Key terms and concepts used in the RelativityOne eDiscovery platform and its APIs.
version: 1.0.0
modified: '2026-05-02'
terms:
  - term: eDiscovery
    definition: >-
      Electronic discovery; the process of identifying, collecting, reviewing, and
      producing electronically stored information (ESI) in response to litigation,
      investigation, or regulatory requests.

  - term: Legal Hold
    definition: >-
      A directive requiring an organization to preserve all relevant data and documents
      related to anticipated or pending litigation or investigation.

  - term: Custodian
    definition: >-
      An individual whose electronic data (email, files, messages) is subject to a
      legal hold or preservation obligation in connection with a legal matter.

  - term: Preservation
    definition: >-
      The process of ensuring that electronically stored information is not altered,
      overwritten, or deleted while subject to a legal hold.

  - term: Artifact ID
    definition: >-
      RelativityOne's internal integer identifier uniquely assigned to each object
      (document, custodian, project, workspace) within the platform.

  - term: Workspace
    definition: >-
      The primary organizational unit in RelativityOne, acting as a container for
      documents, processing, review, and analytic operations for a specific matter.

  - term: Relativity Dynamic Object (RDO)
    definition: >-
      Custom objects created in RelativityOne to represent data structures beyond
      standard document and folder types, supporting flexible data modeling.

  - term: Kepler Framework
    definition: >-
      RelativityOne's REST API hosting framework that allows developers to create
      custom REST API endpoints by implementing .NET interfaces.

  - term: Object Manager
    definition: >-
      The RelativityOne API service for CRUD operations on documents and Relativity
      Dynamic Objects, supporting bulk read, create, update, and delete operations.

  - term: Matter Management
    definition: >-
      The process of organizing and tracking legal cases, projects, and associated
      data, personnel, and deadlines.

  - term: Active Custodian
    definition: >-
      A custodian who is currently under a legal hold obligation and whose data is
      actively being preserved.

  - term: Data Source
    definition: >-
      A system containing custodian data subject to preservation, such as Microsoft
      365 (Exchange, SharePoint, OneDrive) or Google Workspace (Gmail, Drive).

  - term: Communication
    definition: >-
      A legal hold notice, reminder, escalation, or release notification sent to
      custodians to inform them of their preservation obligations.

  - term: Processing
    definition: >-
      The ingestion and preparation of ESI for review in RelativityOne, including
      text extraction, deduplication, and metadata extraction.

  - term: Review
    definition: >-
      The attorney review workflow in RelativityOne for coding documents as relevant,
      privileged, or non-responsive to production requests.

  - term: Privilege Log
    definition: >-
      A log documenting documents withheld from production due to attorney-client
      privilege or work product protection.