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In this chapter, we present a variety of examples to illustrate how the template syntax defined in 5. Syntax Specification can be used to represent expression templates. A SNOMED CT expression template is a SNOMED CT expression, which contains one or more template slots. As defined in 5. Syntax Specification, all template slots are represented using a pair of double square brackets - i.e. [[ ]]

There are two main types of template slots:

  1. Replacement Slots, which are replaced by a concept, expression or string during template processing, and
  2. Information Slots, which are purely there to provide metadata about how the template is to be processed.

The following pages present a range of examples of how these two types of slots are used within expression templates:


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