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HL7 & InterfacesGenerated accuracy model review: 2026-05-06

MSH Builder accuracy and testing

This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.

Formula source

  • The tool concatenates the inputs using the standard delimiters (`|` and `^`). It automatically generates the current timestamp for `MSH-7`.

Test cases

Default input regression check

Generated from the checked-in default inputs and calculate function.

Inputs

  • Sending App: EPIC
  • Sending Facility: HOSP
  • Receiving App: LIS
  • Receiving Facility: LAB
  • Message Type: ADT^A01
  • Control ID: 123456
  • Version: 2.5

Expected outputs

  • MSH Segment: MSH|^~\&|EPIC|HOSP|LIS|LAB|202609231914||ADT^A01|123456|P|2.5

Known limitations

  • This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
  • Use the result as a planning estimate unless the calculator page states a stricter purpose.

Assumptions

  • This builder generates a basic MSH shell using standard delimiters and a browser-generated local timestamp.
  • The processing ID is fixed to `P` in the output, and the tool does not validate whether the chosen message type and version are correct for your local interface.
  • Only the header segment is produced here; downstream segments, acknowledgements, and implementation-specific requirements still need separate review.

Unit handling

  • Sending App accepts text values.
  • Sending Facility accepts text values.
  • Receiving App accepts text values.
  • Receiving Facility accepts text values.
  • Message Type accepts text values.
  • Control ID accepts text values.
  • Version accepts text values.

Rounding rules

  • Number displays use up to 2 decimal places in the calculator UI.

Version history

1.0.0 - 2026-05-06

Generated accuracy and testing page from the current hl7-msh-builder calculator definition.

Change log

2026-05-06

Published default regression test documentation and metadata fallbacks for MSH Builder.

Calculator transparency

Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.

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