| Item | Description | Owner | Notes | Action |
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| 1 | Use of inheres_in for microbiology organism nucleic acid reporting | KN | Looked at examples of microbiology SARS-Cov2 observable entity concepts for reporting viral RNA presence in the SNOMED CT International Edition Opinion is that the inheres_in is still superfluous and will not be relevant in a post-coordinated model of test + specimen | Farzaneh to take these back and discuss internally and decide on the use of inheres_in for these concepts |
| 2 | Use of inheres_in for colour, appearance, identification | FA | inheres_in used for the property to describe the characteristic of an organism, cell or body structure - applicable to LOINC Ontology representations | Farzaneh to present examples to group at a future session |
| 3 | Ratios and fractions - representation of percent | AP | Example 'basophils per hundred leukocytes' - Percent property in the property hierarchy is not correct
- Property is fraction and percent is the unit
UK modelling and proposed LOINC ontology modelling are the same (except for UK including inheres_in) LOINC mapping is number fraction Agreement from the NPU side, percent is the unit and can also be used for other property e.g. mass fraction Stan mentioned unit should be post-coordinated in LOINC (specified in information model) But cannot model 'per 100 entities' in SNOMED CT concept model so have to use the percent unit so this needs further discussion because 'per 100 cells' is more accurate representation than percent
| Farzaneh to create a discussion page on the LOINC Ontology dev side for the percent vs 'per 100 cells' and feedback to the group
Karim and Andrew get some more percentage examples from UK content to look at
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| 4 | Ratios and fractions - property hierarchy | AP | In the lab domain, ratio is used to represent: Test sample against the control / normal pool - Different types of substances e.g. albumin/ creatinine ratio
substances measured by different properties e..g molar vs mass
Fraction represents: - measurements between the same type of substance e.g. fraction of albumin in protein
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