SNOMED Documentation Search


 Other Documents

Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

  • Level 0: No support for storage of
    Glossary ref
    SNOMED CT expressions
  • Level 1: Support for storage of
    Glossary ref
    precoordinated
    Glossary ref
    SNOMED CT expressions
    :
    Anchor
    _83b41d37-9666-4a92-a163-a03f39ab41d1__3
    _83b41d37-9666-4a92-a163-a03f39ab41d1__3
    • Support for storage of a
      Glossary ref
      precoordinated expression
      implies the ability to store a representation of a
      Glossary ref
      concept identifier
      as part of each item for which
      Glossary ref
      SNOMED CT
      is used:
      Anchor
      _83b41d37-9666-4a92-a163-a03f39ab41d1__1
      _83b41d37-9666-4a92-a163-a03f39ab41d1__1
      • The
        Glossary ref
        concept identifier
        may be represented as a 64-bit integer or as an 18-digit string ;
      • Other internal representations may be used provided they can be resolved to the appropriate
        Glossary ref
        Identifier
        for display, communication or processing.
  • Level 2: Support for storage of
    Glossary ref
    postcoordinated
    Glossary ref
    SNOMED CT expressions
    :
    Anchor
    _83b41d37-9666-4a92-a163-a03f39ab41d1__2
    _83b41d37-9666-4a92-a163-a03f39ab41d1__2
    • Support for storage of
      Glossary ref
      postcoordinated expression
      implies the ability to store a representation that captures the logical model of a
      Glossary ref
      postcoordinated expression
      :
      • The simplest representation of a
        Glossary ref
        postcoordinated expression
        is the
        Glossary ref
        SNOMED CT compositional grammar
        . Due to the open-ended nature of
        Glossary ref
        postcoordinated expressions
        , this representation results in a string of variable length with no clear-cut maximum length.
      • The guide discusses alternative representations including the use of
        Glossary ref
        expression
        reference table which enables use of a fixed length reference within the records. This approach uses a UUID which can be represented as a 128-bit integer or as a hexadecimal string (see Storing expressions ) .
    • This level has variants depending on the extent of support for
      Glossary ref
      postcoordinated expression
      storage:
      Anchor
      _83b41d37-9666-4a92-a163-a03f39ab41d1__e
      _83b41d37-9666-4a92-a163-a03f39ab41d1__e
      • Low: Storage of
        Glossary ref
        postcoordinated expressions
        limited to specific fields in the record structure;
      • High: Full support for storage of
        Glossary ref
        postcoordinated expression
        allowing any valid
        Glossary ref
        expression
        to be stored and retrieved.

...

  • Level 0: No native support for
    Glossary ref
    SNOMED CT
    enabled data retrieval:
    Anchor
    _f60106b9-a1c8-44c6-82d9-75965e0d0bce__f
    _f60106b9-a1c8-44c6-82d9-75965e0d0bce__f
    • This level has variants depending on whether it can map code in exported data to
      Glossary ref
      SNOMED CT expressions
      :
      Anchor
      _f60106b9-a1c8-44c6-82d9-75965e0d0bce__0
      _f60106b9-a1c8-44c6-82d9-75965e0d0bce__0
      • Low: No support for
        Glossary ref
        SNOMED CT
        based analysis;
      • High: Support for extracting a specified set of locally coded data and mapping the local codes to appropriate
        Glossary ref
        SNOMED CT expression
        for central aggregation and analysis.
  • Level 1: Support for retrieval of
    Glossary ref
    precoordinated
    Glossary ref
    SNOMED CT expressions
    :
    Anchor
    _f60106b9-a1c8-44c6-82d9-75965e0d0bce__1
    _f60106b9-a1c8-44c6-82d9-75965e0d0bce__1
    • This level has a spectrum of variants depending on the level of support for the following features:
      Anchor
      _f60106b9-a1c8-44c6-82d9-75965e0d0bce__5
      _f60106b9-a1c8-44c6-82d9-75965e0d0bce__5
      • Query expressivity: The ability to express query predicates that explicitly include or exclude
        Glossary ref
        subtypes
        of specifically identified
        Glossary ref
        concepts
        ;
      • Subsumption testing: Use of
        Glossary ref
        SNOMED CT
        Glossary ref
        subtype hierarchy
        to interpret and evaluate queries;
      • Glossary ref
        Concept Equivalence
        : The ability to retrieve equivalent information even if it is represented in different structures within the record;
      • Context awareness: The ability to take account of contextual information, derived from the record structure and/or the
        Glossary ref
        SNOMED
        Glossary ref
        expression
        , when interpreting and evaluating queries;
      • Performance: The ability to interpret and evaluate queries within an appropriate period of time and without causing deterioration in other system functions.
  • Level 2: Support for retrieval of
    Glossary ref
    postcoordinated
    Glossary ref
    SNOMED CT expressions
    :
    Anchor
    _f60106b9-a1c8-44c6-82d9-75965e0d0bce__6
    _f60106b9-a1c8-44c6-82d9-75965e0d0bce__6
    • This level has a spectrum of variants depending on the level of support for the following additional aspects of the features specified for Level 1:
      Anchor
      _f60106b9-a1c8-44c6-82d9-75965e0d0bce__e
      _f60106b9-a1c8-44c6-82d9-75965e0d0bce__e
      • Query expressivity: The ability to represent
        Glossary ref
        postcoordinated
        predicates in a query ;
      • Subsumption testing: Use of
        Glossary ref
        defining characteristics
        and
        Glossary ref
        normal form transformations
        (or a
        Glossary ref
        description logic classifier
        ) to determine whether
        Glossary ref
        expressions
        are subsumed by query predicates;
      • Glossary ref
        Equivalence
        : Use of
        Glossary ref
        defining characteristics
        and
        Glossary ref
        normal form transformations
        (or a
        Glossary ref
        description logic classifier
        ) to determine
        Glossary ref
        equivalence
        between different
        Glossary ref
        postcoordinated expressions
        and in different structures within the record;
      • Context awareness: The ability to take account of contextual information derived from the record structure and/or
        Glossary ref
        postcoordinated
        Glossary ref
        SNOMED
        Glossary ref
        expressions
        , when interpreting and evaluating queries;
      • Performance: The ability to interpret and evaluate queries that support
        Glossary ref
        postcoordinated
        representations within an appropriate period of time and without causing deterioration in other system functions.

...

  • Anchor
    _c0528298-1f3b-4abc-b965-97db5ade147d__d
    _c0528298-1f3b-4abc-b965-97db5ade147d__d
    Level 0: Mapping based support for communication of
    Glossary ref
    SNOMED CT expressions
    :
    • Inbound communications containing
      Glossary ref
      SNOMED CT expressions
      :
      Anchor
      _c0528298-1f3b-4abc-b965-97db5ade147d__7
      _c0528298-1f3b-4abc-b965-97db5ade147d__7
      • Low: Not supported.
      • Medium: Rendered as human-readable text. Unless the inbound message also contains the term text, this requires access to some
        Glossary ref
        SNOMED CT
        enable
        Glossary ref
        Terminology services
        to lookup and display the relevant terms .
      • High: Mapped to an internal coding scheme or classification. This may be feasible to support specific use cases but not for the full scope of clinical information.
    • Outbound communication containing
      Glossary ref
      SNOMED CT expressions
      :
      • Low: Not supported;
      • Medium: Supported for a few specific types of clinical data in the existing system by mapping to from an existing code system to
        Glossary ref
        SNOMED CT
        ;
      • High: Supported for most clinical data in the existing system by mapping to from an existing code system to
        Glossary ref
        SNOMED CT
        .
  • Level 1: Native support for communication of
    Glossary ref
    precoordinated
    Glossary ref
    SNOMED CT expressions
    :
    • Inbound communications containing
      Glossary ref
      precoordinated
      Glossary ref
      SNOMED CT expressions
      :
      • Low: Supported for some types of information but constrained by data entry and
        Glossary ref
        expression
        storage capabilities;
      • High: Supported for most types of information.
    • Outbound communications containing
      Glossary ref
      precoordinated
      Glossary ref
      SNOMED CT expressions
      :
      Anchor
      _c0528298-1f3b-4abc-b965-97db5ade147d__6
      _c0528298-1f3b-4abc-b965-97db5ade147d__6
      • Low: Supported but limited by data entry and storage and retrieval capabilities;
      • High: Supported for most types of information.
  • Level 2: Native support for communication of
    Glossary ref
    postcoordinated
    Glossary ref
    SNOMED CT expressions
    :
    Anchor
    _c0528298-1f3b-4abc-b965-97db5ade147d__e
    _c0528298-1f3b-4abc-b965-97db5ade147d__e
    • Inbound communications containing
      Glossary ref
      postcoordinated
      Glossary ref
      SNOMED CT expressions
      :
      • Low: Support limited to particular attributes (e.g. |laterality|, |causative agent|) in
        Glossary ref
        postcoordinated expression
        ;
      • Medium: Support for general
        Glossary ref
        postcoordination
        applied to some types of information;
      • High: Able to receive, process and store any valid
        Glossary ref
        postcoordinated expression
        .
    • Outbound communications containing
      Glossary ref
      postcoordinated
      Glossary ref
      SNOMED CT expressions
      :
      Anchor
      _c0528298-1f3b-4abc-b965-97db5ade147d__3
      _c0528298-1f3b-4abc-b965-97db5ade147d__3
      • Low: Support limited to particular attributes (e.g. |laterality|, |causative agent|) in
        Glossary ref
        postcoordinated expression
        ;
      • Medium: Support for outbound communication of any
        Glossary ref
        postcoordinated expression
        that can be entered or stored in the system;
      • High: Support for outbound communication of any valid
        Glossary ref
        postcoordinated expression
        .