SNOMED CT® Release Format 1 (RF1) Guide - ihtsdo

3.4.1. File Naming Convention - Overview
3.4.1.1. General File Naming Pattern
The basic pattern for SNOMED CT release file names consists of five elements, each separated by an
underscore ("_ ") and followed by a full stop (" .") and a file extension:
Each element in the above structure is described in more detail in subsequent sections.
3.4.1.2. General Naming Rules
The following rules apply generally to all elements of the file name:
• All elements are mandatory and may not have a null value;
• Elements of the file name may only contain alphanumeric characters, with the exception of hyphens (" -")
used in connection with language codes (see detail for the ContentSubType element below);
• All text should be in US English, except as explicitly allowed below;
• Abbreviations should not be used, except for specified codes or tags;
• The maximum length of a file name (including separators and extension) is 128 characters.
3.4.1.3. Rules for "Readme" Files
Readme files distributed as part of a SNOMED CT release have their own specific naming convention, as
shown below:
Language is the language code for the language of the Readme file, as specified below for the ContentSubType
element, and the VersionDate corresponds to the version date of the release.
3.4.2. FileType element
3.4.2.1. Description
The FileType element of the filename designates the type and intended use of the release file. It consists of
a 3-5 letter code and must be lowercase.
3.4.2.2. Rules
Allowable FileType codes are shown in the table below:
Table 234: Allowable File Type Codes
Code
"sct" +
"der" +
"res" (+ )
"tls" (+)
File Type Description
Terminology Data File
Derivative Work Data File
Implementation Resource Data File
Implementation Resource Tool
Formats | 293
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