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This section of the guide describes the

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Terminology services
that are likely to be required to navigate
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SNOMED CT
hierarchies.

One of the key strengths of

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SNOMED CT
Scg expression
ShowPartsterm
116680003|is a|
rich set of
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relationships
that connect the
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concepts
within the terminology. The primary use of these
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relationships
is to facilitate selective retrieval. However, some of these
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relationships
are arranged in hierarchies that can be navigated using an appropriate user-interface control. For example, the
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subtype hierarchy
formed by the
Scg expression
ShowPartsterm
116680003|is a|
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relationships
can be used to navigate from a selected
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concept
to another
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concept
that has a more specific or less specific meaning.

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SNOMED CT
also specifies standard ways to represent multiple
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navigation
hierarchies that can be designed to meet different requirement. Unlike
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relationship
based hierarchies,
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navigation
hierarchies convey no semantic information but are intended to be used to enhance the user experience when navigating through the terminology.