PMN Rules

The following rules can be applied to dictionary fields using Pseudonimisation (PMN):

Name Data type from Data type to Description Configurable
Age Group Numeric, Date Text Converts a number (age) or date (dob) into an age range, e.g. 7 becomes 0-9 Yes
Date Interval Date Numeric Takes a date field and returns the number of complete years passed since that date No
Date midperiod Date Date Rounds a date to the month/quarter/year level, returning the mid-point of that period Yes
Date part Date Date Changes the format of a date Yes
Date rata die Date Numeric Returns the Rata Die value calculated from the date No
Date year band Date Text Converts a date into a year range, e.g. 27/05/2014 becomes 2010-2015 Yes
Divide by Numeric Numeric Takes the value from another specified column and uses it as a numerator or denominator in a fraction with the given value. Yes
Exclude Outlier Numeric Numeric Excludes the value if it's not in a specific interval Yes
Jitter Numeric Numeric Adds some jitter to a value Yes
Lookup Text Text Lookup a value in CSV file and return the corresponding value Yes
Mask Text Text Masks some characters from text given a template Yes
Number Band Numeric Text Converts a number into a numeric range, e.g. 7 becomes 0-10 Yes
Reduce Precision Numeric Numeric Takes any numeric value (positive, negative, decimal, etc.) and returns the number with a reduced precision Yes
Round Numeric Numeric This will a decimal number and round to nearest integer No
Split Text Text Splits the string with a delimiter and returns the N-th token Yes
Substring Text Text Return the first X characters of a string from a starting index Yes
Updated on October 09, 2025
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