2020-11-18 - SLPG Meeting

Welcome and agenda

@Former user (Deleted)

NOTE

• The last meeting for 2020 to be held on Wednesday 2nd December.

• Meetings will resume in 2021 on Wednesday 27th January.

Postcoordination Guidance

@Former user (Deleted) , @Anne Randorff Højen , @Kai Kewley

Practical Guide to Postcoordination

• Proposal - Use syntax (i.e. braces) to distinguish refinement vs new role group

  • There should be a syntactic distinction between refinement and constructive addition (ie adding a new role group). That is:

    1. 83152002 |Oophorectomy| :  405815000 |Procedure device|  =  122456005 |Laser device|

       • is classified as (i.e. the refinement is added to the role groups in the definition of the focus concept(s)):

         • 83152002 |Oophorectomy| :  
           { 260686004 |Method| = 129304002 |Excision - action|,
              405813007 |Procedure site - Direct| = 15497006 |Ovarian structure|,
              405815000 |Procedure device|  =  122456005 |Laser device| }

    2. 83152002 |Oophorectomy| :  { 405815000 |Procedure device|  =  122456005 |Laser device| }

       • is classified as:

         • 83152002 |Oophorectomy| :  
           { 260686004 |Method| = 129304002 |Excision - action|,
              405813007 |Procedure site - Direct| = 15497006 |Ovarian structure|},
           {  405815000 |Procedure device|  =  122456005 |Laser device| }

  • However, for attributes which are always self-grouped - i.e. Priority, Due to, After, Before, During, Clinical course, Temporally related to, and all Observable entity attributes (see Relationship Group), these must always be put into their own role group:

    1. 125605004 | Fracture of bone |: 42752001 | Due to (attribute) | = 1912002 | Fall |

       •  is classified as:

         • 125605004 | Fracture of bone |: { 42752001 | Due to (attribute) | = 1912002 | Fall | }

         • or

         • 125605004 | Fracture of bone |: 
           { 363698007 |Finding site| = 272673000 |Bone structure|,
             116676008 |Associated morphology | = 72704001 |Fracture| }
           { 42752001 | Due to (attribute) | = 1912002 | Fall | }

• Proposal: Expression forms needed for this (see 3.4 Transforming Expressions)

  • Close to user form - e.g. 83152002 |Oophorectomy| :  405815000 |Procedure device|  =  122456005 |Laser device|

  • Canonical close to user form - e.g. 83152002:405815000=122456005

  • Classifiable form (SCG) - e.g. 83152002:{260686004=129304002,405813007=15497006,405815000=122456005}

    • PLUS Classifiable form (OWL) - e.g.  

      • EquivalentClasses(:123063
           ObjectIntersectionOf (:71388002
               ObjectSomeValuesFrom(:609096000 ObjectIntersectionOf( ObjectSomeValuesFrom(:260686004 :129304002)
               ObjectSomeValuesFrom(:405813007 :15497006))))

  • Necessary normal form - e.g. 83152002+416376001:{260686004=129304002,405813007=15497006,405815000=122456005}

    • PLUS Necessary normal form (tables)

      • Relationships:

        • (123063 116680003 83152002) - 0

        • (123063 260686004 129304002) - 0 

        • (123063 405813007 15497006) - 1

        • (123063 405815000 122456005) - 1

  • Primitive expressions - "<<<" (only useful in a mapping context) → .... relies on the assigned identifier (which are necessarily semantically unique).

• Proposed Transformation Rules - Refinements (in valid domain of focus concepts)
  Close-to-user-form - IF the grouping of the refinement is not concept model valid THEN
            If there is a single (non-self-grouped) role group in the definition of the focus concept, then any ungrouped (but groupable) refinements are merged with this role group
            If there is more than one (non-self-grouped) role group in the definition then flag as ambiguous and require refinement
                         NEED TO FIND a realistic clinical example where this may occur // Prevent failing cases from coming up // use template
                         ALTERNATIVE: Refinement is applied to all (non-self-grouped) role groups in the definition
            Self-grouped attributes in the refinement are grouped on their own - i.e. Priority, Due to, After, Before, During, Clinical course, Temporally related to, and all Observable entity attributes (see Relationship Group)
           Self-grouped attributes in the definition of the focus concept(s) are left unchanged

  1. Single refinement
     83152002 |Oophorectomy| :  405815000 |Procedure device|  =  122456005 |Laser device|

     • →  83152002 |Oophorectomy| :
              { 260686004 |Method|  =  129304002 |Excision - action| ,
                405813007 |Procedure site - direct|  =  15497006 |Ovarian structure|,
                405815000 |Procedure device|  =  122456005 |Laser device|  }

  2. Two groupable refinements
     83152002 |Oophorectomy| :  405815000 |Procedure device|  =  122456005 |Laser device|, 363700003 |Direct morphology| = 367643001 |Cyst |

     • →  83152002 |Oophorectomy| :

     •        { 260686004 |Method|  =  129304002 |Excision - action| ,
                405813007 |Procedure site - direct|  =  15497006 |Ovarian structure|,
                405815000 |Procedure device|  =  122456005 |Laser device| ,
                363700003 |Direct morphology| = 367643001 |Cyst | }

  3. One groupable refinement with one self-grouped refinement
     83152002 |Oophorectomy| :  405815000 |Procedure device|  =  122456005 |Laser device|, 260870009 |Priority| = 394849002 |High priority|

     • →  83152002 |Oophorectomy| :

     •        { 260686004 |Method|  =  129304002 |Excision - action| ,
                405813007 |Procedure site - direct|  =  15497006 |Ovarian structure|,
                405815000 |Procedure device|  =  122456005 |Laser device| }
              { 260870009 |Priority (attribute)| = 394849002 |High priority| }

  4. Refinement attribute matches (or subsumed by) attribute in focus concept's definition
     83152002 |Oophorectomy| : 260686004 |Method|  = 277261002 |Excision biopsy (qualifier value)|

     • → 83152002 |Oophorectomy| :

     •        { 260686004 |Method|  =  129304002 |Excision - action| ,

     •          260686004 |Method|  =  277261002 |Excision biopsy (qualifier value)| ,

     •          405813007 |Procedure site - direct|  =  15497006 |Ovarian structure| }

  5. Refinement explicitly in role group
     83152002 |Oophorectomy| :  { 260686004 |Method|  =  281615006 | Exploration - action | , 405813007 |Procedure site - direct|  =  367643001 |Cyst | }

     • →  83152002 |Oophorectomy| :

     •        { 260686004 |Method|  =  129304002 |Excision - action| ,
                405813007 |Procedure site - direct|  =  15497006 |Ovarian structure| },
              {  260686004 |Method|  =  281615006 | Exploration - action | , 
                405813007 |Procedure site - direct|  =  367643001 |Cyst |}

• Proposed Transformation Rules - Refinements (NOT in valid domain of focus concepts)
  Close-to-user-form - IF the refinement's attribute is not valid for the domain of the focus concept THEN
            If there is a single role group in the definition of the focus concept, which has an attribute value in the domain of the refinement's attribute THEN nest the relevant attribute value with the refinement added to the attribute value
                   (Note: It doesn't matter if the role group is self-grouped or not (see example 1 below)
          If there is more than one role group in the definition of the focus concept, which has an attribute value in the domain of the refinement's attribute THEN  (non-self-grouped) role group in the definition then flag as ambiguous and require refinement

  1. Left aural temperature

     • 415974002 |Aural temperature|: 272741003 |Laterality| = 7771000 |Left|

     • → 415974002 |Aural temperature|: {704327008 |Direct site| = (42859004 |Ear drum|: 272741003 |Laterality| = 7771000 |Left|)}

  2. Malignant tumor of right ovary

     • 363443007 |Malignant tumor of ovary|: 272741003 |Laterality| = 24028007 |Right|

     • → 363443007 |Malignant tumor of ovary|: 

     •      { 116676008 |Associated morphology| = 367651003 |Malignant neoplasm of primary, secondary or uncertain origin|,
               363698007 |Finding site| = ( 15497008 |Ovarian structure| :  272741003 |Laterality| = 24028007 |Right| ) }

• Other Example - Emergency excision of appendix

  1.     80146002 | Excision of appendix | :
            260870009 |Priority|  =  25876001 |Emergency|