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name: sysmlv2-skill description: SysML v2 systems modeling guidance for creating valid models with correct syntax, proper type hierarchies, and validation workflows. Use when working with .sysml files, systems modeling, architecture documentation, SysON, or Eclipse SysML tools. Provides syntax reference, common patterns, error troubleshooting, and best practices from OMG specifications. license: ISC allowed-tools: Bash Read Edit Write Grep Glob WebFetch metadata: version: "1.0.0" author: sysmlv2-skill contributors

SysML v2 Systems Modeling

Authoritative guidance for creating valid SysML v2 models with correct syntax, proper type hierarchies, and integration with validation tools.

Core Principle

SysML v2 is a textual modeling language with formal syntax. Always validate models with the command-line validator before importing into SysON or committing to version control. The language is defined by OMG specifications, implemented by Eclipse tooling, and must follow strict KerML (Kernel Modeling Language) metamodel rules.

Essential References

Primary Sources (in order of authority):

1. OMG SysML v2 Specification: https://www.omg.org/spec/SysML/2.0/

   • Official language specification
   • Normative example model: https://www.omg.org/cgi-bin/doc?ptc/25-04-31.sysml

2. SysML v2 Pilot Implementation: https://github.com/Systems-Modeling/SysML-v2-Pilot-Implementation

   • Reference implementation with parser and validator

3. SysML v2 Release Repository: https://github.com/Systems-Modeling/SysML-v2-Release

   • Standard library models included in the pilot implementation

4. Eclipse SysON: https://doc.mbse-syson.org/ (web-based graphical modeling)

For detailed syntax rules: See references/SYNTAX.md For error troubleshooting: See references/ERRORS.md For common patterns: See references/PATTERNS.md

Validation Workflow

CRITICAL: Always validate before committing or importing to SysON

Use the validate-sysml command from sysmlv2-validator:

validate-sysml model.sysml

Errors are reported in GNU format for editor integration:

filename:line:column: error: message

Top 3 Critical Rules

1. Always add visibility modifier to imports: private import ScalarValues::*; (NOT import ScalarValues::*;)
2. Attribute defs must specialize: attribute def Region :> String; (NOT attribute def Region;)
3. Import ScalarValues for basic types: String, Real, Integer, Boolean all require this import

For complete syntax reference: See references/SYNTAX.md For error troubleshooting: See references/ERRORS.md For common patterns: See references/PATTERNS.md

Integration Workflows

SysON (visual modeling): Deploy via Docker (docker run -p 8080:8080 eclipsesyson/syson:latest) or see https://doc.mbse-syson.org/

Infrastructure-as-Code: Model in SysML → Validate → Implement in Terraform/Pulumi → Verify match