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5.1 Introduction

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This section presents general guidance regarding which SNOMED CT concepts are suitable for use as values for specific attributes of the main classes of the Clinical Statement pattern. These value set constraints are presented at a fairly high level, by partitioning of SNOMED CT into a number of major concept classes that relate to the Vocabulary Domains of that apply to the relevant HL7 attributes.

In most cases, these value sets are supersets of the values used in the constrained models in Common Patterns (any exceptions to this are indicated).

For reasons introduced in this section and explored in greater detail in Detailed aspects of issues with a vocabulary specification formalism, a complete solution to value set representation is not presented in this Guide. The nature of and rationale for the approach taken is given in the following sections.