Syntax of CDAL

The syntax of CDAL has been extended to consist of the following elements:
1. USING TOC: where TOC = [SNOMED]
2. IN [database_ent]+: where database_ent = [GICU-DB, NSICU-DB, CICU-DB, ISM-DB all DB]+
3. FIND [reference_ent statistical_ent]+ : where reference_ent = [all values, any value]; statistical_ent = [mean, median, sd, max, min]
4. OF medical_ent
5. FOR Patient_Class: where Patient_Class is in the form: PATIENTS WHOSE [demographics_ent operator value]*
6. WITH [medical_ent operator value]* [joint_ent medical_ent operator value]*
7. DURING [time_ent]*
8. IN [location_ent]*

Example: The following question is valid:
1. USING SNOMED
2. IN GICU-DB, ISM-DB
3. FIND all values and mean and sd
4. OF heart rate
5. FOR patients whose age > 40 and sex = male
6. WITH ventilation mode = PS AND PEEP <> 20
7. DURING the last 72 hours
8. IN GICU