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  • SNOMED CT Document Library
  • Practical Guides
  • Specifications
  • Implementation Guides
  • User Guides
  • SNOMED CT Release File Specification
  • Introduction
  • Logical Model
    • High Level Logical Model of SNOMED CT
    • Representation of the Logical Model
    • Concept Definitions
  • Release Types, Packages and Files
    • Overview
    • Common Features of All Release Files
      • General Structure of Release Files
      • Release File Data Types
      • Fields Present in All Release Files
      • Meaning of the Active Field
      • History Mechanism
      • Module Identification
    • Release Types
    • Naming Conventions for Release Packages and Files
    • Release Package Contents
  • Component Release File Specification
    • Overview
    • Associations Between Release Files
    • File Format Specifications
    • Metadata Hierarchy
  • Reference Set Release File Specification
    • Overview
    • Basic Reference Set Member File Format
    • Extending the Basic Reference Set Member File Format
    • Naming Conventions for Reference Sets
    • Metadata Supporting Reference Sets
    • Reference Set Types
  • SNOMED CT Identifiers
    • Overview
    • SCTID Data Type
    • SCTID Representation
    • SCTID Constraints
    • Check-digit
    • Partition Identifier
    • Namespace-Identifier
    • Item-Identifier Digits
    • Example SNOMED CT identifiers
    • The Namespace Hierarchy
  • Appendices
    • Appendix A: Notes on Release File Changes
    • Appendix B. Specification Reference Information
    • Appendix C. Unicode UTF-8 encoding
    • Appendix D: Concept Definition Illustrations
    • Appendix E: Concept Enumerations
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  1. Release Types, Packages and Files

Common Features of All Release Files

This subsection explains features that apply to all SNOMED CT release files.

  • General Structure of Release Files

  • Release File Data Types

  • Fields Present in All Release Files

  • Meaning of the Active Field

  • History Mechanism

  • Module Identification

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