Nested Expression Constraints - Valid Expressions

Expression Constraint	Precoordinated	Postcoordinated
<< (^ 700043003 | Example problem list concepts reference set| )	394659003 | Acute coronary syndrome|	194828000 | Angina| : 255234002 | After| = 22298006 | Myocardial infarction| 194828000 | Angina| 371807002 | Atypical angina|
^ (< 450973005 | GP/FP health issue reference set| )	140004 | Chronic pharyngitis|	297009 | Acute myringitis|
(< 404684003 | Clinical finding| : 363698007 | Finding site| = << 39057004 | Pulmonary valve structure| ) AND ^ 700043003 | Example problem list concepts reference set|	204351007 | Fallot’s trilogy|	457652006 | Calcification of pulmonary valve|
(< 404684003 | Clinical finding| : 363698007 | Finding site| = << 39057004 | Pulmonary valve structure| ) AND (< 64572001 | Disease| : 116676008 | Associated morphology| = << 415582006 | Stenosis| )	204351007 | Fallot’s trilogy|	19036004 | Rheumatic heart valve stenosis| : { 363698007 | Finding site| = 39057004 | Pulmonary valve structure| , 116676008 | Associated morphology| = 415582006 | Stenosis| } 56786000 | Pulmonic valve stenosis|
(<< 17636008 | Specimen collection| : 424226004 | Using device| = << 19923001 | Catheter| ) . 363701004 | Direct substance|	78014005 | Urine|	87612001 | Blood|
(<< 404684003 | Clinical finding (finding)| OR << 272379006 | Event (event)| ) : 255234002 | After| = << 71388002 | Procedure (procedure)|	235948002 | Postoperative acute pancreatitis|	64572001 | Disease| : { 370135005 | Pathological process| = 441862004 | Infectious process| , 255234002 | After| = 387713003 | Surgical procedure| , 116676008 | Associated morphology| = 112633009 | Surgical wound| } 441795000 | Infected seroma after surgical procedure|
<< 125605004 | Fracture of bone| : [0..0] ((<< 410662002 | Concept model attribute| MINUS 363698007 | Finding site| ) MINUS 116676008 | Associated morphology| ) = *	125605004 | Fracture of bone|	64572001 | Disease| : { 363698007 | Finding site| = 71341001 | Bone structure of femur| , 116676008 | Associated morphology| = 20946005 | Fracture, closed| } 439987009 | Open fracture of bone|
< 404684003 | Clinical finding| : 47429007 | Associated with| = (< 404684003 | Clinical finding| : 116676008 | Associated morphology| = << 55641003 | Infarct| )	71023004 | Pericarditis secondary to acute myocardial infarction|	3238004 | Pericarditis (disorder)| : 47429007 | Associated with| = 57054005 | Acute myocardial infarction|

Where necessary, these examples make some assumptions about the membership of the example reference sets.