---
id: video/reUoIdQZaNM
type: video
title: 20260209 - Chaos to Clarity - Visualizing AL architecture for scalable Business Central solutions
summary: Applying the C4 model (software system, container, component, code levels) to visualize AL architecture in Business Central, using a bridge app and interface/enum integration provider example. Also covers Structurizr DSL and Copilot checks against SOLID principles.
tier: community
language: en
tags:
  - al architecture
  - c4 model
  - software architecture diagrams
  - interfaces
  - bridge app pattern
  - design principles
  - system design
  - visualization
  - al extension design
  - documentation
  - abstraction levels
  - component design
system: development
review:
  state: reviewed
  by: opus
  at: "2026-10-07T23:21:58.823Z"
  flags: []
generated:
  at: "2026-10-07T23:21:58.878Z"
  pipeline: 0.2.0
  prompts:
    extract-video: 1
    summarize-video: 2
  input_hash: 2c4f3aa81fd6d2bf0ef749f91b3736e09eb0a8e7ea91ef7c11b897bd031d3a4c
evidence:
  - kind: video
    url: https://www.youtube.com/watch?v=reUoIdQZaNM&t=259s
    title: 20260209 - Chaos to Clarity - Visualizing AL architecture for scalable Business Central solutions
    date: "2026-02-12T16:06:05.000Z"
    commit: null
    t: 259
    quote: I would consider myself as a NAV dinosaur. I started in consulting with the finance consulting
  - kind: video
    url: https://www.youtube.com/watch?v=reUoIdQZaNM&t=363s
    title: 20260209 - Chaos to Clarity - Visualizing AL architecture for scalable Business Central solutions
    date: "2026-02-12T16:06:05.000Z"
    commit: null
    t: 363
    quote: there was a large comet uh hitting me and that was interfaces
  - kind: video
    url: https://www.youtube.com/watch?v=reUoIdQZaNM&t=447s
    title: 20260209 - Chaos to Clarity - Visualizing AL architecture for scalable Business Central solutions
    date: "2026-02-12T16:06:05.000Z"
    commit: null
    t: 447
    quote: this concept of a bridge app uh sounded very very intriguing
  - kind: video
    url: https://www.youtube.com/watch?v=reUoIdQZaNM&t=488s
    title: 20260209 - Chaos to Clarity - Visualizing AL architecture for scalable Business Central solutions
    date: "2026-02-12T16:06:05.000Z"
    commit: null
    t: 488
    quote: too much design up front is dump. No design up front is even dumber.
  - kind: video
    url: https://www.youtube.com/watch?v=reUoIdQZaNM&t=824s
    title: 20260209 - Chaos to Clarity - Visualizing AL architecture for scalable Business Central solutions
    date: "2026-02-12T16:06:05.000Z"
    commit: null
    t: 824
    quote: The definition that Simon is doing the C4 model is a defined set of abstractions and a defined set of diagrams
links:
  learn: []
  objects: []
  features: []
  topics: []
  localizations: []
  videos: []
  posts: []
  guidelines: []
video_id: reUoIdQZaNM
channel: yt-areopa
source_name: Areopa webinars
url: https://www.youtube.com/watch?v=reUoIdQZaNM
published_at: "2026-02-12T16:06:05.000Z"
duration_s: 3076
captions: derived
audience:
  - developer
  - functional consultant
  - partner
chapters:
  - t: 0
    title: Introduction and Housekeeping
  - t: 162
    title: Presenter Background and Journey
  - t: 249
    title: Evolution from NAV to Modern Architecture
  - t: 363
    title: The Challenge - Interfaces and Bridge Apps
  - t: 467
    title: Searching for Clarity through Diagrams
  - t: 565
    title: Exploring Architecture Diagram Types
  - t: 680
    title: Introduction to the C4 Model
  - t: 895
    title: C4 Model Levels and Mapping to AL Architecture
  - t: 1038
    title: System Context View and Diagram Principles
  - t: 1173
    title: Container and Component Views with Design Decisions
  - t: 1440
    title: Communicating Architecture to Stakeholders
  - t: 1591
    title: Practical Application to Business Central Solution
  - t: 1876
    title: Detailed Solution Hub Design Patterns and Testing
  - t: 2070
    title: AI and Architecture Design Integration
  - t: 2216
    title: Tooling Recommendations and AI-Assisted Validation
features:
  - name: C4 Model for Architecture Visualization
    status: unclear
    t: 753
    verified: false
    status_source: video
  - name: Bridge App Pattern for System Integration
    status: unclear
    t: 407
    verified: false
    status_source: video
  - name: AL Interfaces
    status: unclear
    t: 348
    verified: false
    status_source: video
  - name: Architecture Diagram Documentation
    status: unclear
    t: 1328
    verified: false
    status_source: video
  - name: Code Architecture Reflection
    status: unclear
    t: 1395
    verified: false
    status_source: video
  - name: Stakeholder Architecture Communication
    status: unclear
    t: 1520
    verified: false
    status_source: video
  - name: Solution hub module
    status: unclear
    t: 1697
    verified: false
    status_source: video
  - name: EROC connector
    status: unclear
    t: 1832
    verified: false
    status_source: video
  - name: Projects integration module
    status: unclear
    t: 1888
    verified: false
    status_source: video
  - name: Enum-based integration provider pattern
    status: unclear
    t: 1996
    verified: false
    status_source: video
  - name: Architecture clarity improves AI prompts
    status: unclear
    t: 2070
    verified: false
    status_source: video
  - name: Structurizr DSL for architecture as code
    status: unclear
    t: 2261
    verified: false
    status_source: video
  - name: Copilot architecture validation
    status: unclear
    t: 2362
    verified: false
    status_source: video
  - name: Structurizer playground
    status: unclear
    t: 2497
    verified: false
    status_source: video
objects_mentioned:
  - other EROC
  - other solution component
  - other solution hub
  - other EROC connector
  - other projects integration module
  - enum integration provider
  - interface integration interface
  - other C4 model
  - other Structurizer
quotes:
  - t: 259
    text: I would consider myself as a NAV dinosaur. I started in consulting with the finance consulting
    check: exact
  - t: 363
    text: there was a large comet uh hitting me and that was interfaces
    check: exact
  - t: 447
    text: this concept of a bridge app uh sounded very very intriguing
    check: exact
  - t: 488
    text: too much design up front is dump. No design up front is even dumber.
    check: exact
  - t: 824
    text: The definition that Simon is doing the C4 model is a defined set of abstractions and a defined set of diagrams
    check: exact
---

# 20260209 - Chaos to Clarity - Visualizing AL architecture for scalable Business Central solutions

> Applying the C4 model (software system, container, component, code levels) to visualize AL architecture in Business Central, using a bridge app and interface/enum integration provider example. Also covers Structurizr DSL and Copilot checks against SOLID principles.

[Watch on YouTube](https://www.youtube.com/watch?v=reUoIdQZaNM) · Areopa webinars · 2026-02-12 · 51:16 · tier community · reviewed (checked by Opus)

## Overview

A Business Central developer with a NAV background describes how interfaces and the bridge app pattern left him with unclear architecture, and how the C4 model gave him a way to organize it. He maps the four C4 levels to Business Central concepts: extensions, PTEs and AL namespaces.

He applies this to a solution hub PTE with an EROC connector bridge app and a projects integration module that uses an enum and interfaces to support different project providers. He then covers communicating at the right level to stakeholders, Structurizr DSL for architecture as code, and using Copilot to review diagrams against SOLID principles.

## Key points

- The C4 model uses four levels: software system, container, component and code. C4 containers are not Docker containers.
- Mapping used in the session: Business Central as the software system, PTEs and AppSource apps as containers, namespaces inside extensions as components, and AL files grouped in folders or namespaces as the code level.
- Enum-based integration provider pattern: an enum defines providers and interfaces supply the implementations, so new providers can be added without changing existing code. A test app can mock a provider.
- The bridge app pattern lets external systems connect through interchangeable connector apps, so a connector can be removed while the data stays in Business Central. The presenter found the architectural work not easy.
- Write design decisions into diagrams, for example whether systems exchange JSON or XML.
- Use system context and container views for business executives, and deeper levels for developers.
- Structurizr DSL keeps the model and its views in one file, so a model change updates every view, though diagrams must be exported again. Copilot generated a DSL file from a draw.io diagram screenshot, and it can be rendered in the Structurizr web playground.

## Chapters

- [0:00](https://www.youtube.com/watch?v=reUoIdQZaNM&t=0s) Introduction and Housekeeping
- [2:42](https://www.youtube.com/watch?v=reUoIdQZaNM&t=162s) Presenter Background and Journey
- [4:09](https://www.youtube.com/watch?v=reUoIdQZaNM&t=249s) Evolution from NAV to Modern Architecture
- [6:03](https://www.youtube.com/watch?v=reUoIdQZaNM&t=363s) The Challenge - Interfaces and Bridge Apps
- [7:47](https://www.youtube.com/watch?v=reUoIdQZaNM&t=467s) Searching for Clarity through Diagrams
- [9:25](https://www.youtube.com/watch?v=reUoIdQZaNM&t=565s) Exploring Architecture Diagram Types
- [11:20](https://www.youtube.com/watch?v=reUoIdQZaNM&t=680s) Introduction to the C4 Model
- [14:55](https://www.youtube.com/watch?v=reUoIdQZaNM&t=895s) C4 Model Levels and Mapping to AL Architecture
- [17:18](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1038s) System Context View and Diagram Principles
- [19:33](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1173s) Container and Component Views with Design Decisions
- [24:00](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1440s) Communicating Architecture to Stakeholders
- [26:31](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1591s) Practical Application to Business Central Solution
- [31:16](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1876s) Detailed Solution Hub Design Patterns and Testing
- [34:30](https://www.youtube.com/watch?v=reUoIdQZaNM&t=2070s) AI and Architecture Design Integration
- [36:56](https://www.youtube.com/watch?v=reUoIdQZaNM&t=2216s) Tooling Recommendations and AI-Assisted Validation

## Features

| Feature | Status | At |
|---|---|---|
| C4 Model for Architecture Visualization | status not stated, demoed | [12:33](https://www.youtube.com/watch?v=reUoIdQZaNM&t=753s) |
| Bridge App Pattern for System Integration | status not stated, demoed | [6:47](https://www.youtube.com/watch?v=reUoIdQZaNM&t=407s) |
| AL Interfaces | status not stated, demoed | [5:48](https://www.youtube.com/watch?v=reUoIdQZaNM&t=348s) |
| Architecture Diagram Documentation | status not stated, demoed | [22:08](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1328s) |
| Code Architecture Reflection | status not stated | [23:15](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1395s) |
| Stakeholder Architecture Communication | status not stated, demoed | [25:20](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1520s) |
| Solution hub module | status not stated | [28:17](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1697s) |
| EROC connector | status not stated, demoed | [30:32](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1832s) |
| Projects integration module | status not stated, demoed | [31:28](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1888s) |
| Enum-based integration provider pattern | status not stated, demoed | [33:16](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1996s) |
| Architecture clarity improves AI prompts | status not stated | [34:30](https://www.youtube.com/watch?v=reUoIdQZaNM&t=2070s) |
| Structurizr DSL for architecture as code | status not stated, demoed | [37:41](https://www.youtube.com/watch?v=reUoIdQZaNM&t=2261s) |
| Copilot architecture validation | status not stated, demoed | [39:22](https://www.youtube.com/watch?v=reUoIdQZaNM&t=2362s) |
| Structurizer playground | status not stated, demoed | [41:37](https://www.youtube.com/watch?v=reUoIdQZaNM&t=2497s) |

## AL objects mentioned

As heard in the captions. A name that matches one object page by exact type and name links to it; the others stay as named.

- other "EROC" at [6:47](https://www.youtube.com/watch?v=reUoIdQZaNM&t=407s)
- other "solution component" at [16:52](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1012s)
- other "solution hub" at [28:17](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1697s)
- other "EROC connector" at [30:32](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1832s)
- other "projects integration module" at [31:39](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1899s)
- enum "integration provider" at [33:16](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1996s)
- interface "integration interface" at [33:16](https://www.youtube.com/watch?v=reUoIdQZaNM&t=1996s)
- other "C4 model" at [41:48](https://www.youtube.com/watch?v=reUoIdQZaNM&t=2508s)
- other "Structurizer" at [41:48](https://www.youtube.com/watch?v=reUoIdQZaNM&t=2508s)

Not found in BC28-30: enum "integration provider", interface "integration interface".

## Quotes

- [4:19](https://www.youtube.com/watch?v=reUoIdQZaNM&t=259s) "I would consider myself as a NAV dinosaur. I started in consulting with the finance consulting"
- [6:03](https://www.youtube.com/watch?v=reUoIdQZaNM&t=363s) "there was a large comet uh hitting me and that was interfaces"
- [7:27](https://www.youtube.com/watch?v=reUoIdQZaNM&t=447s) "this concept of a bridge app uh sounded very very intriguing"
- [8:08](https://www.youtube.com/watch?v=reUoIdQZaNM&t=488s) "too much design up front is dump. No design up front is even dumber."
- [13:44](https://www.youtube.com/watch?v=reUoIdQZaNM&t=824s) "The definition that Simon is doing the C4 model is a defined set of abstractions and a defined set of diagrams"

Presenters (as heard): Christian Lind, Ted Johnston, Alex, Simon, Espen, Camille, Jeremy.