16 — RhoeDSL Reference

Status

• Normative baseline
• Version: 0.9.0
• Layer: Part 1 / Author Surfaces

1. Purpose

This chapter defines rhoedsl as the structure-first humane surface aligned to the 0.9.0 canonical AST.

2. Surface Status

• rhoedsl is a humane structural mirror of the canonical AST.
• It is not the AST itself.
• It is not a revived Swift-subset language.
• It is a disciplined structural surface for authors and tools that prefer explicit braces and explicit node identity.

3. Stage Sketch

Artifact(
  id: "growth-review",
  title: "Growth Strategy Review",
  carrierArchetype: stageFrame,
  genre: executiveDecision,
  compositionGrammarRef: "executive/default"
) {
  FrontMatter {
  }
  MainMatter {
    FrameSection(title: "Decision") {
      FrameSet(id: "core", aspect: "16:9") {
        Frame(shellRole: comparisonOption, shell: "option-comparison") {
          Zone(header) {
            TextBlock(text: "Option B creates the strongest margin expansion with acceptable execution risk.")
          }
          Zone(main) {
            TableBlock(rows: tableRows)
          }
          Zone(aside) {
            TextBlock(text: "Assumptions: phased migration, pricing uplift, no phase-one headcount reduction.")
          }
        }
      }
    }
  }
  BackMatter {
  }
}

4. Non-stage Sketch

Artifact(
  id: "risk-register",
  title: "Risk Register",
  carrierArchetype: ledgerRegister,
  genre: ext.operationsRegister,
  compositionGrammarRef: "ledger/default"
) {
  FrontMatter {
    Dashboard(title: "Portfolio Health") {
      TextBlock(text: "Current portfolio health.")
    }
  }
  MainMatter {
    Collection(title: "Risks") {
      Schema(title: "risk.v1") {
      }
      Record(id: "risk-001") {
        TextBlock(text: "severity: high; owner: finance")
      }
    }
  }
  BackMatter {
    Constraint(title: "Severity Constraint") {
      TextBlock(text: "Severity must be one of low, medium, high.")
    }
  }
}

5. Canonical Node Spellings

• Artifact
• FrontMatter
• MainMatter
• BackMatter
• Section
• Subsection
• SubSubsection
• stage nodes such as FrameSection, FrameSet, AppendixFrameSet, Frame, Zone
• non-stage nodes such as Codex, Stream, TableauDocument, Sheet, Collection, Box, Thread

6. Compatibility Bridge

Superseded spelling	0.9.0 canonical spelling
Document	Artifact
Deck	FrameSet or other carrier-native structures
Slide	Frame
shellGrammarRef	compositionGrammarRef

7. rhoemd and rhoedsl Equivalence

• rhoemd and rhoedsl are equal-status humane source surfaces of the same language.
• They must lower to the same canonical AST.
• One surface does not own semantics that the other cannot express.
• The shipped rhoedsl grammar explicitly covers all baseline carrier families; generic fallback remains for extension-owned nodes only.