# Document Transcription System Overview (Version 4)

Version 4 is the architecture baseline for the personal-scale application used to transcribe, organize, and preserve historical documents, source images, and related people records.

## Recommended Reading Order

1. [System Architecture](architecture_v4.md) for capabilities, technical stack, runtime structure, workflows, and component ownership.
2. [System Requirements](requirements_v4.md) for the verifiable V4 contract.
3. [Data Model](schema_v4.md) for entities, relationships, constraints, and persistence rules.
4. [Error Handling Policy](error_handling_v4.md) for the V4 taxonomy and boundary contracts.

## Cross-Version Invariants

- [Historical Document Transcription Design Intent](../invariant/intent.md)
- [Transcription Methodology](../invariant/transcription_methodology.md)
- [Error Handling](../invariant/error_handling.md)
- [Digital Evidence and AI Processing Provenance](../invariant/ai_evidence_and_provenance.md)
- [UI Style Guide](../invariant/ui_style_guide.md)

## V4 Transition Documents

- [Scope Boundary](scope_boundary_v4.md)
- [Implementation Plan](implementation_plan_v4.md)

## Incremental Revisions

- [V4.1 Scope](../ver4.1/scope_boundary_v4_1.md) and [Implementation Plan](../ver4.1/implementation_plan_v4_1.md)
- [V4.2 Evidence and Provenance Scope](../ver4.2/scope_boundary_v4_2.md) and [Implementation Plan](../ver4.2/implementation_plan_v4_2.md)
- [V4.3 Settings Scope](../ver4.3/scope_boundary_v4_3.md) and [Implementation Plan](../ver4.3/implementation_plan_v4_3.md)
- [V4.4 Semantic Registries, Linked People, and Printing Scope](../ver4.4/scope_boundary_v4_4.md) and [Implementation Plan](../ver4.4/implementation_plan_v4_4.md)
- [V4.5 Transcription Input Normalization and Quality Scope](../ver4.5/scope_boundary_v4_5.md) and [Implementation Plan](../ver4.5/implementation_plan_v4_5.md)