Resources

Start here

1. 

   Explore the playground

   Interactive · play.urdad.org ↗

   The modelling tool in your browser, with the example models open. Explore every view, or build a model of your own.

2. 

   Follow a worked example

   Guide · docs.urdad.org ↗

   The method applied step by step to a small bank, from one use case to the process which realises it.

3. 

   Open an example model

   Download

   Complete models of a bank, an insurer and an auctioneer, each with its views and the documentation the tool generates.

Understand the method and the tool

• The URDAD method

  Guide · docs.urdad.org ↗

  The method on its own, independently of any tool: its principles, its three phases, and how they repeat at every level.

• Why URDAD?

  Guide · docs.urdad.org ↗

  The case for one model of the business: what it replaces, and what an organisation gains from it.

• Modelling in the tool

  Guide · docs.urdad.org ↗

  The modelling tool’s views and elements, and how a team edits one model together in real time.

• URDAD for domain-driven design teams

  Overview

  Bounded contexts with contracts at their boundaries, checked as you model and tested without writing a test.

• URDAD for financial services

  Overview

  Every change evidenced, every provider held to contract, and the record kept for your auditors, under DORA, GDPR or POPIA.

Look something up

• User manual

  Reference · docs.urdad.org ↗

  How the tool behaves, from modelling through projects and security to execution and deployment.

• Cheat sheet

  Reference · docs.urdad.org ↗

  Every symbol of every view on two pages, as the tool draws it, and what it means.

  PDF, A4 · PDF, Letter

• Glossary

  Reference · docs.urdad.org ↗

  Every term and acronym of the method, the tool and its documentation, defined once, each at an address of its own.

• URDAD model specification

  Specification · docs.urdad.org ↗

  Every element of a URDAD model, its attributes, relationships and meaning, generated from the model’s schema.

• URDAD-OCL specification

  Specification · docs.urdad.org ↗

  The language of a model’s conditions and constraints: its grammar, what each expression means, and its standard library.

• URDAD-FEEL specification

  Specification · docs.urdad.org ↗

  The same specifications in the notation of DMN’s FEEL, and how each reads as URDAD-OCL.

• The model's JSON schema

  JSON schema

  The schema of a model file as the tool writes it, served at the address its $id names.