2017-09-13 - SLPG Meeting

Welcome and apologies

Discuss questions from Daniel

1. to support expression repositories (i.e. where the substrate is dynamic in that expressions could be added), do we need to add the ability to use the ECL to apply constraint operators to post-coordinated expressions, i.e. where a piece of the ECL string is to be interpreted as a SCG expression, e.g. << [ 404684003 | Clinical finding (finding) |: 363698007 |Finding site (attribute)| = 10200004 | Liver structure (body structure) | ]? This would correspond to a DL query.
2. to support potential expansion of the SNOMED CT logic profile, do we need to extend SCG to support axioms as opposed to only expressions, for example to allow (non-hidden) GCAs to be stated in SCG?
3. we need an SNOMED CT OWL specification, i.e. how is SNOMED CT (concepts and descriptions) represented in OWL. Is this within the scope of this group?

• GCIs - Clarification required as to whether non-necessary conditions will be in scope
  • For example, a concept |Disorder of the arm or leg| defined with 2 sufficient (but individually not necessary) conditions such as |Finding site|= |Arm structure|, |Finding site| = |Leg structure|
• Role chains - Not an issue to ECL
• Universal restriction - out of scope
• Concepts as numbers - needs discussion (Do we need to transform these to concrete domains to compute?)

• Review proposed Query Language examples
• Additional requirements from SLPG members?

Next meeting to be held at 20:00 UTC on Wednesday 8th November 2017 (due to Linda's travel commitments)