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QUALITYAvailable

Structural Validation

Deterministic verification of syntax, stable identifiers, and valid graph target references.

Deterministic Validation Rules

Structural validation checks machine rules with 100% certainty. Structural issues must be fixed for a specification to be considered conformant UXDL 0.1.

Enforced Structural Checks

  • Unsupported format version (must be 0.1).
  • Duplicate screen or action identifiers in same module.
  • Invalid identifier syntax (must match ^[a-z0-9][a-z0-9_]*$).
  • Broken parent reference (modal or sheet pointing to non-existent host screen).
  • Broken target screen reference in relation ('to: screen_id' does not exist).
  • Broken target state reference in relation ('state: state_id' does not exist on target screen).
  • Multiple destination forms rule (declaring both 'to' and 'external' in same relation).