ECL 2.0 Proposal

• The approach agreed at last week's SLPG meeting, and supported by SNOMED International is the followingas follows:
  • To select and/or filter columns of a reference set, field names will be used
  • Field names will come directly from the international RF2 specification (http://snomed.org/rfs), if the associated reference set pattern is defined there. In all other cases, the field names will come directly from the RF2 files themselves. E.g.
    • ^  447562003 |ICD-10 complex map reference set|  {{ M mapGroup = #2, mapPriority = #1, mapTarget = "J45.9" }
  • The reference set pattern concepts defined in the international RFS, will always be a < 900000000000455006 |Reference set| and has no ancestor with a refset descriptor. Only reference set grouper concepts (which do not themselves have refset descriptors)
  • the highest subtypes of < |Reference set| that have a refset descriptor pattern.
• A computable representation of these international reference set patterns will be shared. Effective ways of distributing this computable representation can be raised in the MAG.

Expression Constraint Language 2.0 WIP

Please review updates to the following pages:

• 1. Introduction (History)
• 3.2 Expression Constraint and Query Requirements
• 4. Logical Model
• 4.1 Details
• 5.1 Brief Syntax (Normative)
• 5.2 Long Syntax (Informative)
• 5.3 Informative Comments
• 5.4 Order of Operation
• 6.1 Simple Expression Constraints (Member Of) **
• 6.8 Description Filters (Module, Effective Time, Active Filters)
• 6.10 Member Filters **
• 6.11 History Supplements
• Appendix D - ECL Quick Reference