SFC Profile

Related: SFC Editor, Visual Companion Model

SFC Profile

This document defines the current truST scope for Sequential Function Chart (SFC) support.

Scope

• IEC SFC keywords such as STEP, TRANSITION, and ACTION are reserved by the lexer.
• truST ships a visual SFC editor/profile in the public docs and editor workflows.
• Textual SFC body syntax is not currently part of the Structured Text parser.

Current Authoring Model

Use the visual-editor workflow for current SFC authoring guidance:

• docs/public/develop/visual-editors/sfc.md

The reserved-keyword and extension boundary is tracked in docs/IEC_DEVIATIONS.md (DEV-020).

Ownership

• Lexer/token reservation: 01-lexical-elements.md
• Visual-editor/runtime alignment: 17-visual-editors-runtime-unification.md
• User-facing authoring workflow: docs/public/develop/visual-editors/sfc.md