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Welcome and apologies

Examples of using LET ... IN . ..(Note: This would be an optional construct. The part after the 'IN' is the mandatory part)

• • (LET substrate = X IN *) MINUS (LET substrate = Y 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

  • (LET substrate = X IN << 12345) MINUS (LET substrate = Y IN << 12345)

  • , language = Y

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

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

Using Language Reference Sets

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

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