ECL examples

For full details including the historical background to ECL please see: Expression Constraint Language - Specification and Guide

The following Introduction to simple ECL expressions is reproduced from the above guide section A.1 Simple Expression Constraints - Valid Expressions

Expression Constraint	Valid Expression¹
	Precoordinated	Postcoordinated
404684003 \| Clinical finding\|	404684003 \| Clinical finding\|	-
< 404684003 \| Clinical finding\|	64572001 \| Disease\|	404684003 \| Clinical finding\| : 363698007 \| Finding site\| = 80891009 \| Heart structure\|
	56265001 \| Heart disease\|
<< 73211009 \| Diabetes mellitus\|	73211009 \| Diabetes mellitus\|	73211009 \| Diabetes mellitus\| : 42752001 \| Due to\| = 61823004 \| Injury of pancreas\|
	46635009 \| Diabetes mellitus type 1\|
	105401000119101 \| Diabetes mellitus due to pancreatic injury\|
<! 404684003 \| Clinical finding\|	64572001 \| Disease\|	404684003 \| Clinical finding\| : 116676008 \| Associated morphology\| = 79654002 \| Edema\| ²
	267038008 \| Edema\|
> 40541001 \| Acute pulmonary edema\|	111273006 \| Acute respiratory disease\|	64572001 \| Disease\| : 116676008 \| Associated morphology\| = 79654002 \| Edema\| , 363698007 \| Finding site\| = 39607008 \| Lung structure\|
	404684003 \| Clinical finding\|
	138875005 \| SNOMED CT concept\|
>> 40541001 \| Acute pulmonary edema\|	40541001 \| Acute pulmonary edema\|	64572001 \| Disease\| : 263502005 \| Clinical course\| = 424124008 \| Sudden onset AND/OR short duration\| , { 116676008 \| Associated morphology\| = 40829002 \| Acute edema\| , 363698007 \| Finding site\| = 39607008 \| Lung structure\| }
	111273006 \| Acute respiratory disease\|
	404684003 \| Clinical finding\|
	138875005 \| SNOMED CT concept\|
>! 40541001 \| Acute pulmonary edema\|	111273006 \| Acute respiratory disease\|	19829001 \| Disorder of lung\| : { 116676008 \| Associated morphology\| = 79654002 \| Edema\| , 363698007 \| Finding site\| = 39607008 \| Lung structure\| } ³
	19242006 \| Pulmonary edema\|
^ 700043003 \| Example problem list concepts reference set\|	394659003 \| Acute coronary syndrome\|	-
	194828000 \| Angina\|
	29857009 \| Chest pain\|
*	138875005 \| SNOMED CT concept\|	404684003 \| Clinical finding\| : 363698007 \| Finding site\| = 80891009 \| Heart structure\|
	404684003 \| Clinical finding\|	71388002 \| Procedure\| : 405813007 \| Procedure site - Direct\| = 66754008 \| Appendix structure\|
	322236009 \| Paracetamol 500mg tablet\|	373873005 \| Pharmaceutical / biologic product\| : { 127489000 \| Has active ingredient\| = 412031009 \| Paracetamol or derivative\| }

Footnotes
Ref	Notes
1	Where necessary, these examples make some assumptions about the membership of the example reference sets.
2	Please note that this makes the assumption that the given expression constraint is executed against a finite set of expressions that has been pre-classified (e.g. in an expression repository), and that after classification there are no intermediate expressions between this expression and 404684003 \|Clinical finding\|.
3	Please note that this makes the assumption that the given expression constraint is executed against a finite set of expressions that has been pre-classified (e.g. in an expression repository), and that after classification there are no intermediate expressions between 40541001 \|Acute pulmonary edema\| and this expression.

Expression Constraint	Valid Expression¹
	Precoordinated	Postcoordinated
404684003 \| Clinical finding\|	404684003 \| Clinical finding\|	-
< 404684003 \| Clinical finding\|	64572001 \| Disease\|	404684003 \| Clinical finding\| : 363698007 \| Finding site\| = 80891009 \| Heart structure\|
	56265001 \| Heart disease\|
<< 73211009 \| Diabetes mellitus\|	73211009 \| Diabetes mellitus\|	73211009 \| Diabetes mellitus\| : 42752001 \| Due to\| = 61823004 \| Injury of pancreas\|
	46635009 \| Diabetes mellitus type 1\|
	105401000119101 \| Diabetes mellitus due to pancreatic injury\|
<! 404684003 \| Clinical finding\|	64572001 \| Disease\|	404684003 \| Clinical finding\| : 116676008 \| Associated morphology\| = 79654002 \| Edema\| ²
	267038008 \| Edema\|
> 40541001 \| Acute pulmonary edema\|	111273006 \| Acute respiratory disease\|	64572001 \| Disease\| : 116676008 \| Associated morphology\| = 79654002 \| Edema\| , 363698007 \| Finding site\| = 39607008 \| Lung structure\|
	404684003 \| Clinical finding\|
	138875005 \| SNOMED CT concept\|
>> 40541001 \| Acute pulmonary edema\|	40541001 \| Acute pulmonary edema\|	64572001 \| Disease\| : 263502005 \| Clinical course\| = 424124008 \| Sudden onset AND/OR short duration\| , { 116676008 \| Associated morphology\| = 40829002 \| Acute edema\| , 363698007 \| Finding site\| = 39607008 \| Lung structure\| }
	111273006 \| Acute respiratory disease\|
	404684003 \| Clinical finding\|
	138875005 \| SNOMED CT concept\|
>! 40541001 \| Acute pulmonary edema\|	111273006 \| Acute respiratory disease\|	19829001 \| Disorder of lung\| : { 116676008 \| Associated morphology\| = 79654002 \| Edema\| , 363698007 \| Finding site\| = 39607008 \| Lung structure\| } ³
	19242006 \| Pulmonary edema\|
^ 700043003 \| Example problem list concepts reference set\|	394659003 \| Acute coronary syndrome\|	-
	194828000 \| Angina\|
	29857009 \| Chest pain\|
*	138875005 \| SNOMED CT concept\|	404684003 \| Clinical finding\| : 363698007 \| Finding site\| = 80891009 \| Heart structure\|
	404684003 \| Clinical finding\|	71388002 \| Procedure\| : 405813007 \| Procedure site - Direct\| = 66754008 \| Appendix structure\|
	322236009 \| Paracetamol 500mg tablet\|	373873005 \| Pharmaceutical / biologic product\| : { 127489000 \| Has active ingredient\| = 412031009 \| Paracetamol or derivative\| }

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