# Missing Required Fields

## Ontology Metadata

Code: ISS-0022
Version: ISS-0022@0.1.0
Ontology release: 0.1.0
Updated: 2026-05-10T00:00:00Z
Canonical URL: /workbench/issues/missing-required-fields/

## Summary

The AI returns structured output that omits fields required by the schema, workflow, parser, form, or downstream consumer.

## Category

- CAT-0010 — Output
  - URL: /workbench/categories/output/
  - Summary: Problems where generated content, citations, fields, formats, parser-facing output, or structured responses are missing, malformed, unsupported, or unusable.

## Primary Pattern

- PAT-0130 — Incomplete Declaration
  - URL: /workbench/patterns/incomplete-declaration/
  - Summary: A structural condition where an element is declared but required attributes, dependencies, or linked definitions are missing.

## Declared Patterns

- PAT-0130 — Incomplete Declaration
  - URL: /workbench/patterns/incomplete-declaration/
  - Summary: A structural condition where an element is declared but required attributes, dependencies, or linked definitions are missing.
- PAT-0160 — Schema Breakage
  - URL: /workbench/patterns/schema-breakage/
  - Summary: A structural condition where an instance, graph, payload, or object violates the type, shape, or rule requirements of a declared schema.
- PAT-0280 — Density Vacuum
  - URL: /workbench/patterns/density-vacuum/
  - Summary: A structural condition where a region expected to contain sufficient nodes, edges, coverage, or relationships falls below declared density thresholds.

## Derived Primary Lenses

- LEN-0100 — Absence Lens
  - URL: /workbench/lenses/absence-lens/
  - Summary: Detects structurally required elements that are missing from the observed structure.
- LEN-0140 — Compression Lens
  - URL: /workbench/lenses/compression-lens/
  - Summary: Reduces structural graphs into stable minimal representations for comparison, redundancy detection, and diffing.
- LEN-0160 — Constraint Sufficiency Lens
  - URL: /workbench/lenses/constraint-sufficiency-lens/
  - Summary: Evaluates whether declared constraints are sufficient to eliminate structural degrees of freedom.
- LEN-0200 — Interface Contract Lens
  - URL: /workbench/lenses/interface-contract-lens/
  - Summary: Compares declared interface structure to observed runtime structure to detect contract deviations.
- LEN-0210 — Invariant Lens
  - URL: /workbench/lenses/invariant-lens/
  - Summary: Verifies that declared invariants are structurally enforceable and not contradicted by observed structure.

## Derived Secondary Lenses

- LEN-0150 — Conflict Lens
  - URL: /workbench/lenses/conflict-lens/
  - Summary: Detects mutually incompatible constraints, claims, states, or declarations that cannot be simultaneously satisfied.

## Search Intents

- missing required fields
- AI output missing fields
- structured output missing required field
- JSON missing required keys
- AI skipped required fields
- schema validation missing fields