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The following data types are used in the release files:

Table 2.3-1: Data Types Used in Release Files

Data Type

   Description

SCTID

A SNOMED CT identifier, between 6 and 18 digits long, as described in 5.2. SCTID Representation .

UUID

A Universally Unique Identifier is a 128-bit unsigned generated using a standard algorithm.

  • UUIDs are represented as strings of hexadecimal characters split by - characters as points specified by the UUID standard.

A 32-bit signed integer.

String

UTF-8 text of a specified length.

Boolean

A Boolean value, represented as one of two possible integer values (1 = true, 0 = false).

Time

A date and time format expressed in line the basic representation specified in the ISO 8601 standard.

  • Where only date is required the format is YYYYMMDD (e.g. 20180125 refers to 25th January 2018)
  • Where a time is also required the YYYYMMDDThhmmssZ (e.g. 20180125T123000Z refers to 12:30 UTC on 25th January 2018)
  • The time should be expressed as UTC, as indicated by the trailing "Z".

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