SNOMED CT Languages Project Group

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Date & Time

20:00 UTC Wednesday 14th February 2018

Teleconference Details

To join the meeting please go to https://snomed.zoom.us/j/471420169. 

Further information can be found at SLPG meeting information

Goals

  • Progress SNOMED Query language

Attendees 

Apologies

Ed Cheetham, Daniel Karlsson

Agenda and Meeting Notes

Description
Owner
Notes

Welcome and apologies

Linda Bird


Query Language

Linda Bird

Examples of using LET ... IN ...

    • LET X = (<< 1234 : 5678 = << 6547) IN X MINUS >! X

      • Find leaf nodes of X

Examples of using ... FROM ...

    • << 64572001 |Disease| {{ term = "*heart*" }} FROM version = Y

    • << 64572001 |Disease| {{ synonym = "*heart*" }} FROM version = Y

    • << 64572001 |Disease| {{ FSN = "*heart*" }} FROM version = Y

    • << 64572001 |Disease| {{ FSN = "*heart*" }} FROM version = Y, language = W

    • << 64572001 |Disease| {{ preferredTerm = “*heart*”}} FROM  version = X, language = Y

    • << 64572001 |Disease| {{ acceptableTerm = “*heart*”}} FROM  version = X, language = Y

    • (* FROM version = X, language = Z) MINUS (* {{ term = "*heart*" }} FROM version = Y, language = W)


Q: What attributes are used by this set of concepts?

Linda Bird

Using Language Reference Sets

    • What options do we provide for constraining terms, preferred terms, fully specified names, acceptable terms and/or selecting language refsets?
      • Next meeting - need to clarify which keywords we need for lexical searching, and exactly what their meaning is
Confirm next meeting date/time
Linda Bird

There will be NO meeting in 2 weeks, due to travel commitments

Next meeting to be held at 20:00 UTC on Wednesday 14th March 2018

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5 Comments

  1. Ed Cheetham

    Apologies Linda, all

    I shall not be able to attend this call.

    Kind regards

    Ed

    1. Linda Bird

      Thanks for letting us know Ed! Enjoy your evening!

      Kind regards,
      Linda.

  2. Michael Lawley

    The following shows how I've prototyped extending the ECL syntax to support simple filters.


    Original ECL grammar rule

    conjunctionExpressionConstraint = subExpressionConstraint 1*(ws conjunction ws subExpressionConstraint)

    Updated and additional grammar rules:

    conjunctionExpressionConstraint = subExpressionConstraint 1*(ws conjunction ws (subExpressionConstraint / filterExpression))

    filterExpression = "{{" ws filter 1*(ws "," ws filter) ws "}}")

    filter = filter_name filter_op filter_val

    ...

    For filter_name, I've implemented "term", "moduleId", "effectiveTime", and both "definitionStatus" and "definitionStatusId".


    1. Linda Bird

      Thanks Michael! Very useful.

      Have you used "C" and "D" prefixes for the filter names, or just assumed that moduleId and effectiveTime refer to the concept?

      I suggest that we should focus on language refsets next, in terms of defining searches over preferred and acceptable terms in a given language/dialect.

      Kind regards,
      Linda.

      1. Michael Lawley

        At the moment the only things my filters act on are concepts, so no need for "C" etc. and "term" for us means "all known label for the concept".  This includes things like the conceptId itself as well as descriptionIds.