Validation rule

As explained in Architecture Modernization: Socio-technical alignment of software, strategy, and structure

A business rule is a constraint, policy, or decision criterion that governs behavior in a business domain.

A validation rule is a business constraint, policy, or decision criterion that governs behavior in a domain. Making important rules explicit helps teams compare architectural boundaries with business meaning. section 12.3.1

Use validation rules to:

• List the five rules most important to the domain. section 12.3.1
• Surface disagreements and share business knowledge across the group. section 12.3.1
• Check whether names, descriptions, and communications remain cohesive around the rules. section 12.3.1

Discounts and marketing

When a discounts capability depends on marketing, examine whether the dependency reflects a business rule and whether combining the areas would reduce complexity without overloading one team. section 12.3.1

Figure 12.16 The bounded context canvas

Use the bounded context canvas to make business rules visible alongside domain terminology, dependencies, and communication. section 12.3.1

How Architecture Modernization: Socio-technical alignment of software, strategy, and structure covers it

How deep it goes

Captures rules through a short group exercise and collective canvas review rather than detailing implementation mechanics.

Examples

Uses discounts and marketing dependencies, a bounded context canvas, and a top-five-rules group exercise.

What you can do after

Practice/perform a collaborative exercise that surfaces important rules, misalignment, and boundary trade-offs.

How it connects

Connects business rules with domain terminology, dependencies, bounded contexts, and cognitive load.

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Related concepts

• validationused by · The process of checking data, behavior, systems, models, or results against defined criteria to assess their correctness, suitability, or acceptability.
• ownershipconfigured by · Ownership is a programming-language model that assigns responsibility for controlling a value or resource, including its lifetime and eventual cleanup.
• preconditioncontrasts with · A precondition is a condition or requirement that must be satisfied before an operation, process, or action can proceed correctly.
• DOM updatecontrasts with · A modification to the Document Object Model that changes a document's represented content, structure, or presentation.
• rulekind of · A rule is an explicitly specified condition, procedure, or directive that governs behavior, decisions, or outcomes in a defined domain.
• RequiredAttributeconfigured by · RequiredAttribute is a .NET data-annotation validation attribute that requires an annotated property or field to have a supplied, non-null value.

This explainer was generated by Manning's knowledge graph from the text of Architecture Modernization: Socio-technical alignment of software, strategy, and structure. The section links point to the parts of the book it draws on.