Arden (syntax)

A markup language used for representing and sharing medical knowledge and used in an executable format by clinical decision support systems to generate alerts, interpretations, and to screen and manage messages to clinicians.

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Arden Syntax v2.10 | Arden Syntax 3.0 Proposal

Rule sets, called Medical Logic Modules, comprise enough logic to make a single medical decision. Medical logic modules are written in Arden syntax, and are called by a program – an event monitor – when the condition they are written to help with occurs.

 title: To check the diastolic blood pressure of the patient;;
 mlmname: Hypotension;;
 arden: version 2.7;;
 version: 1.00;;
 institution: Latrobe University Bundoora;;
 author: Lakshmi Devineni;;
 specialist: ;;
 date: 2013-06-02;;
 validation: testing;;
library:
 purpose: check if the diastolic blood pressure of the patient is within limits;;
 explanation: This MLM is an example for reading data and writing a message;;
 keywords: hypotension; categorization;;
 citations: ;;
 links: http://en.wikipedia.org/wiki/Hypotension;;
knowledge:
 type: data_driven;;
 data:
 /* read the diastolic blood pressure */
 diastolic_blood_pressure := read last
 {diastolic blood pressure}; /* the value in braces is specific to your 
 runtime environment */
 /* If the height is lower than height_threshold, output a message */
 diastolic_pressure_threshold := 60;
 stdout_dest := destination
 {stdout};
 ;;
 evoke: null_event;;
 logic:
 if (diastolic_blood_pressure is not number) then
 conclude false;
 endif;
 if (diastolic_blood_pressure >= diastolic_pressure_threshold) then
 conclude true;
 else
 conclude false;
 endif;
 ;;
 action:
 write "Your Diastolic Blood Pressure is too low (hypotension)"
 at stdout_dest;
 ;;
resources:
 default: de
 ;;
 language: en
 'msg' : "The normal range from 60 to 90";
 ;;
 language: de
 'msg' : "Der Normalbereich von 60 bis 90";
 ;;
end:

See The Arden Syntax standard for clinical decision support (direct PDF link)

Fuzzy Arden Syntax Compiler (paper) Fuzzy Arden Syntax: a fuzzy programming language for medicine

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Last modified 02 June 2021