Storing Patient Data using Expressions

Storing Patient Data using Expressions

When implementing postcoordinated SNOMED CT expressions, there are different approaches to storage that may be considered.

• Store the full expression in the same way as you would store any coded data item

• Reference the expression in the record storage using a local expression identifier, and hold the expressions in a separate expression repository

• Store the expression parts individually in separate fields

These approaches are described in the following pages.

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