CASE syntax 1

[Geates]

I'm getting "Parm1 : Test must be a function call or variable name". Isn't this how I refer to a variable from the source structure?

(case ([red]~input%SDC_ADT.MSH.MSH-9-message_type.MSH-9-2_trigger_event[/red])
   (("A01" "A04" "A05" "A08" "A13")
      (not-verify ~input%SDC_ADT.PV1.PV1-3-assigned_patient_location.PL.point_of_care/nu "MH")
   )
   (("A02")
      (not-verify ~input%SDC_ADT.PV1.PV1-3-assigned_patient_location.PL "OR\|L1\|NS")
   )
)

-Geates

"I hope I can feel and see the change - stop the bleed inside a feel again. Cut the chain of lies you've been feeding my veins; I've got nothing to say to you!"
-Infected Mushroom

"I do not offer answers, only considerations."
- Geates's Disclaimer

 

[Geates]

Even though that seems like a variable to me, I decided to redundantly put it through a string function. It works fine now.

(case ([red]subseq[/red] ~input%SDC_ADT.MSH.MSH-9-message_type.MSH-9-2_trigger_event [red]0 3[/red])

-Geates

"I hope I can feel and see the change - stop the bleed inside a feel again. Cut the chain of lies you've been feeding my veins; I've got nothing to say to you!"
-Infected Mushroom

"I do not offer answers, only considerations."
- Geates's Disclaimer

 

[rxp]

You could also have tried:

(string->symbol ~input%SDC_ADT.MSH.MSH-9-message_type.MSH-9-2_trigger_event)

and that would have done the trick.

rxp.

 

[Geates]

string->symbol Syntax
(string->symbol string)

Description
Creates a symbol from the specified string.

Return Value
symbol
A symbol created from the specified string.

Examples
(string->symbol "mISSISSIppi") => mISSISSIppi
(symbol?(string->symbol "mISSISSIppi")) => #t

The Monk reference on this function isn't very helpful. What is a "symbol"

-Geates

"I hope I can chill and see the change - stop the bleed inside and feel again. Cut the chain of lies you've been feeding my veins; I've got nothing to say to you!"
-Infected Mushroom

"I do not offer answers, only considerations."
- Geates's Disclaimer

 

[rxp]

Think of the 'Conversion Procedures' (Chapter 11) as a way to more accurately test/validate your logic, depending on what you are testing.

string->symbol
For CASE statements, it assigns the value of the specified string to the 'symbol'. The symbol is then tested. The symbol may contain alphanumeric characters.
-If you don't convert, and your string contains a number, you may get an error.

char->number
In this case you can test for less than, greater than, equal to. For example, in HL7, the date comes in as YYYYMMDD. You can test for a specific date, after a specific date, between a date. etc.
-If you don't convert, and your char is not a number, you may get an error.

There are other conversions listed. You need to be aware of all the possible types of data/characters you will be testing. This will determine which one of the conversion procedures better fits your needs.

 

[Geates]

Because ADT Types almost always contain numbers and errors may occur from CASEing alphanumberic expressions, I'll have to investigate my logic further. Thanks for bring it to my attention.

-Geates

"I hope I can chill and see the change - stop the bleed inside and feel again. Cut the chain of lies you've been feeding my veins; I've got nothing to say to you!"
-Infected Mushroom

"I do not offer answers, only considerations."
- Geates's Disclaimer