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Welcome

CDS Platform

Find and work with CSI classification standards in one place. Search MasterFormat®, UniFormat®, and OmniClass®, explore how classifications are organized and connected, and keep project information aligned with current editions.

CDS Platform applications shown on desktop and tablet devices

Start here

Search the standardsFind a classification by number, title, or keyword.Browse classificationsExplore MasterFormat from broad divisions into more specific classifications.Understand a classificationUse More to view Includes, Notes, See Also, and other available guidance.Connect related classificationsUse Crosswalks to see related classifications in other CSI standards.Update to a newer editionUse Transitions to see how MasterFormat 2020 relates to MasterFormat 2026.

Platform overview

CSI Dynamic Standards brings supported CSI standards and editions into one connected workspace.

Each classification includes information that helps you understand where it belongs and how it relates to other classifications. Depending on the classification, you can explore broader or more specific classifications, related classifications in other standards, and changes between editions.

CSI Dynamic Standards application card
Search classifications across supported systems and editions.
Division Hierarchies application card
Browse MasterFormat and OmniClass records in an expandable hierarchy.
Document Transition Assistant application card
Use transitions to support MasterFormat upgrades in a project document.
Classification Verification Tool application card
Check a project document for classifications from the expected edition.

Get access

Sign in with the account connected to your organization or subscription. The documentation is public, but licensed classification content is available only through the CDS Platform under the applicable terms.

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Classification systems

MasterFormat

Organizes information around construction work results, requirements, and specification-related subjects.

UniFormat

Organizes information around functional building elements and systems.

OmniClass

Provides tables for classifying different kinds of built-environment information.

Browse classifications

Start with a broad classification and move to more specific classifications beneath it. Read Browse classifications, or use Division Hierarchies to explore an expandable tree.

Connect related classifications

Crosswalks are links between standards and related classifications. Use them to move between related classifications in MasterFormat, UniFormat, and OmniClass.

Update to a newer edition

Transitions support upgrades between editions. Use them to see how a MasterFormat 2020 classification relates to its available classification or classifications in MasterFormat 2026.

Clipboard

Add individual records to the platform clipboard, attach working notes, and copy the collection. See the Clipboard guide.

Platform tools

Focused workflows for hierarchy browsing and project-document review.

Division HierarchiesBrowse classification records as an expandable tree.Document Transition AssistantReview MF 2020 references and available MF 2026 transitions in a PDF.Classification VerificationCheck classification-like text against an expected edition.

Recommended workflow

  1. Select the standard and edition that match your task.
  2. Search by classification number, title, or keyword.
  3. Open a result and confirm its standard and edition.
  4. Review its explanation and place in the hierarchy.
  5. Use crosswalks to follow related classifications into another standard.
  6. Use transitions when updating classifications to a newer edition.
  7. Use a dedicated tool for hierarchy browsing, document transition review, or verification.

Keep learning

Video tutorialsWatch concise product walkthroughs.GuidesOpen practical PDF references.