brianpos

{
  "categories": [
    {
      "name": "Existence",
      "sectionNumber": "5.1",
      "functions": [
        {
          "functionName": "empty",
          "description": "Returns `true` if the input collection is empty (`{ }`) and `false` otherwise.",
          "arguments": [],

brianpos

This isn't a sensible fhirpath expression that does something useful, however it does check the edges of a fhirpath parser. I've tried to check every single parsing rule, not every function avaialable.

(
  (
    (( -5.25 * 2 div 3 mod 2 + +3 - 1).toString() & ' units' )      /* polarity + multiplicative + additive + concatenation */
    |
    ( {} | true | %resource | false | 'hello' | 42 | 123L | @2025-08-21
      | @2025-08-21T12:34:56.789Z | @T08:00:00 | 5 'mg' | 3 days )  /* union of (null, booleans, string, number, long, date, datetime, time, qty(STRING), qty(keyword-unit) */
      | %ext 

brianpos

extern alias r4;
using r4.Hl7.Fhir.Model;
using Hl7.Fhir.Model;
using Hl7.Fhir.StructuredDataCapture;
using Hl7.Fhir.Utility;
using Hl7.FhirPath;
using Hl7.FhirPath.Expressions;
using Microsoft.AspNetCore.DataProtection.KeyManagement;
using ModelContextProtocol.Server;
using System.ComponentModel;

brianpos

The processing output lists for each IG and its dependencies (nested):

• Package ID
• Package Version
• Number of resources that are selected
  • At the root level these are the canonical resoures, so remaining files are likely examples, indexes or non-canonical resources
  • At the dependency level, the number of canonical resources that are required by one of the parent IGs in the dependency tree
• The total number of resources in the package
• The number of canonical resources that the package requires (that it does not conain itself) - external canonicals
• The number of those external canonicals that were not able to be resolved in the IGs dependency tree
• A bulletted list of the unresolved external canonicals

brianpos

using Hl7.Fhir.Model;
using Hl7.Fhir.Utility;
using Hl7.FhirPath;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Hl7.Fhir.FhirPath;
using Hl7.Fhir.ElementModel;

brianpos

using Hl7.Fhir.Model;
using Hl7.Fhir.Specification;
using Hl7.Fhir.Specification.Navigation;
using Hl7.Fhir.Specification.Snapshot;
using Hl7.Fhir.Specification.Source;
using Hl7.Fhir.Utility;
using Hl7.Fhir.WebApi;
using Hl7.FhirPath;
using System;
using System.Collections;

brianpos

import type { CodeableConcept, Coding, OperationOutcome, OperationOutcomeIssue, Reference, Resource, Parameters } from "fhir/r4b";
import fhirpath from "fhirpath";
import { logMessage, CreateOperationOutcome } from "~/utils/create-outcome";

// --------------------------------------------------------------------------
// The concept of this POC is to demonstrate an approach to perform some
// async based methods as functions inside the fhirpath engine without
// converting the entire engine to process things asynchronously.
// e.g. Terminology functions such as memberOf, subsumes, or resolve()
//

brianpos

Questionnaire top level validation should consider:

• Check the canonical versioning algorithm and version don't contradict each other
• Add a warning that the canonical URL is highly recommended
• if status = published, ensure that has a canonical URL
• information/warning if derivedFRom isn't a versioned canonical URL
• Should subjectType and launch context be the same?
• Check the copyright label is from the set of approved licenses?
• Should there be some date checks on the approved, review and date etc?
• definitionBased flag
• anything needed for the replaces extension?

brianpos

using Hl7.Fhir.Introspection;
using Hl7.Fhir.Support;
using Hl7.Fhir.Utility;
using Hl7.FhirPath.Expressions;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Reflection;
using System.Text;

brianpos

using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using Hl7.Fhir.Model;
using Hl7.Fhir.Rest;
using Hl7.Fhir.Serialization;
using Hl7.Fhir.Utility;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Newtonsoft.Json;