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In RF2 , release files will be named predictably and in such a way as to avoid naming clashed between files in the International release and National releases .The basic pattern for SNOMED CT release file names consists of five elements, separated by an underscore ("_"), followed by a full stop (".") and a file extension :

Full details of the file naming convention can be found in the " SNOMED CT File Naming Convention" document(see associated documentation).All release files :

• are UTF-8 encoded, tab delimited text files.
• contain a column header row, providing field names for each column within the file. Lower camel case is used for the field names (e.g. moduleId (field), effectiveTime (field) ).
• use DOS style line termination. Each line is terminated with a carriage return character followed by a line feed character.
• Should have a last line that ends with a line terminator (CR/LF) before the end of file.