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Welcome, apologies and agenda review

Record attendees and apologies

Review agenda for today's meeting

Members of Descendants

• Decision - To add ability to do "^ (expressionConstraint)", using brackets around the expressionConstraint unless it is a single refset concept

B2i proposes that the MemberOf function is allowed to be applied to a set of reference sets

• ^<<446609009^(<<446609009|Simple type reference set|) /* Invalid */

Constraints over Medication Strength

• Decision - No action for now. To be revisited when the Default Extension Drugs Model is in place

B2i proposes that a new symbol is introduced to indicate a refinement of a relationship - for example:

• • < |Pharmaceutical / biologic product}: 
    { |has active ingredient| = << |calcium carbonate|, 
    ( |has basis of strength| = |calcium only|) : (|strength magnitude| >= #500), |strength unit| = |mg|)}

See Template Syntax Specification

• Suggestion to add a new chapter on 'Slot placement and template processing'

Please provide any other comments you have.

Remove slots and replace slots

• • Remove slot: [[ 1..1 ]], [[ 1..1 @slotName ]]
    
  • Replace slot: [[ +id (<< 138875005 |SNOMED CT concept|) ]], [[ +id ]], [[ + ]], [[ +id(<<138875005 |SNOMED CT concept) @slotName $valueReference ]]
  • Example: CT of X
    71388002 |Procedure| : [[1..1 @roleGroup1]]
    { 260686004 |Method| = 312251004 |Computed tomography imaging action|,
      405813007 |Procedure site - Direct| = [[+id (<<442083009 |Anatomical or acquired body structure|)] @site] }

Replace slots - Type of replacement

• • Replace with single concept: [[ +id ]]
  • Replace with any expression: [[ +scg ]]
  • Replace with an expression constraint: [[ +ecl ]]
  • Replace with a character string: [[ +str ]]
    • Use cases include replacing comparison operators "=" and "!="
  • Example 1: MRCM domainTemplateForPrecoordination (Finding with explicit context)
    • [[+id(<< 243796009 |Situation with explicit context (situation)|: [0..0] 408730004 |Procedure context| = *, [0..0] 363589002 |Associated procedure| = *)]]: 
      [[0..*]] { [[1..*]] 408729009 |Finding context| = [[+id(<< 410514004 |Finding context value (qualifier value)|)]], 
      [[1..*]] 408731000 |Temporal context| = [[+id(<< 410510008 |Temporal context value (qualifier value)|)]], 
      [[0..*]] 246090004 |Associated finding| = [[+id(<< 404684003 |Clinical finding (finding)| OR << 272379006 |Event (event)|)]], 
      [[0..*]] 408729009 |Finding context| = [[+id(<< 410514004 |Finding context value (qualifier value)|)]], 
      [[0..*]] 408732007 |Subject relationship context| = [[+id(<< 125676002 |Person (person)|)]], 
      [[0..*]] 408731000 |Temporal context| = [[+id(<< 410510008 |Temporal context value (qualifier value)|)]] }
  • Example 2: MRCM domainTemplateForPostcoordination (Finding with explicit context)
    • [[+id(<< 243796009 |Situation with explicit context (situation)|: [0..0] 408730004 |Procedure context| = *, [0..0] 363589002 |Associated procedure| = *)]]: 
      [[0..*]] { [[1..*]] 408729009 |Finding context| = [[+id(<< 410514004 |Finding context value (qualifier value)|)]], 
      [[1..*]] 408731000 |Temporal context| = [[+scg(<< 410510008 |Temporal context value (qualifier value)|)]], 
      [[0..*]] 246090004 |Associated finding| = [[+scg(<< 404684003 |Clinical finding (finding)| OR << 272379006 |Event (event)| OR << 363787002 |Observable entity (observable entity)| 
      OR << 416698001 |Link assertion (link assertion)| OR << 71388002 |Procedure (procedure)|)]], 
      [[0..*]] 408729009 |Finding context| = [[+scg(<< 410514004 |Finding context value (qualifier value)|)]], 
      [[0..*]] 408732007 |Subject relationship context| = [[+scg(<< 125676002 |Person (person)|)]], 
      [[0..*]] 408731000 |Temporal context| = [[+scg(<< 410510008 |Temporal context value (qualifier value)|)]] }

Cardinality

• • Cardinality of relationship group
    • Pattern: [[ 1..* ]] { .. }
    • Default operator between repeats: "," / "AND"
    • Example: CT of X
      71388002 |Procedure| : [[1..1 ]]
      { 260686004 |Method| = 312251004 |Computed tomography imaging action|,
        405813007 |Procedure site - Direct| = [[+id (<<442083009 |Anatomical or acquired body structure|)] @site] }
  • Cardinality of attribute value pair
    • Pattern: [[ 1..* ]] 123345 |Attribute| = 234456 |Value|
    • Default operator between repeats: "," / "AND"
    • Example: CT of X
      71388002 |Procedure| :
      { 260686004 |Method| = 312251004 |Computed tomography imaging action|,
        [[ 1..1 ]] 405813007 |Procedure site - Direct| = [[+id (<<442083009 |Anatomical or acquired body structure|)] @site] }
  • Cardinality of focus concepts
    • Pattern: [[ +() 1..* ]]
    • Default operator between repeats: "+" / "AND"
      • How would we achieve an operator of "OR" in an Expression Constraint? - e.g. [[+ecl 1..* ]] → A OR B OR C
    • Example: 
       [[+id(<< 404684003 |Clinical finding|) 1..* ]]
     
  • Other types of cardinalities?

• • The fact that a template processor would need to 'clean-up' any left over characters, such as ":". I suggest that we try to document the steps that a template processor should follow to turn a template into an expression, constraint etc.