diff --git a/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/analytics/PackageVisitor.java b/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/analytics/PackageVisitor.java
index 1608bfbe0..38ce67160 100644
--- a/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/analytics/PackageVisitor.java
+++ b/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/analytics/PackageVisitor.java
@@ -12,7 +12,7 @@ import org.hl7.fhir.exceptions.FHIRException;
 import org.hl7.fhir.utilities.SimpleHTTPClient;
 import org.hl7.fhir.utilities.TextFile;
 import org.hl7.fhir.utilities.SimpleHTTPClient.HTTPResult;
-import org.hl7.fhir.utilities.json.JSONUtil;
+import org.hl7.fhir.utilities.json.JsonUtilities;
 import org.hl7.fhir.utilities.json.JsonTrackingParser;
 import org.hl7.fhir.utilities.npm.FilesystemPackageCacheManager;
 import org.hl7.fhir.utilities.npm.NpmPackage;
@@ -132,12 +132,12 @@ public class PackageVisitor {
       list.add(i.getId());
     }    
     JsonObject json = JsonTrackingParser.fetchJson("https://raw.githubusercontent.com/FHIR/ig-registry/master/fhir-ig-list.json");
-    for (JsonObject ig : JSONUtil.objects(json, "guides")) {
-      list.add(JSONUtil.str(ig, "npm-name"));
+    for (JsonObject ig : JsonUtilities.objects(json, "guides")) {
+      list.add(JsonUtilities.str(ig, "npm-name"));
     }
     json = JsonTrackingParser.fetchJson("https://raw.githubusercontent.com/FHIR/ig-registry/master/package-feeds.json");
-    for (JsonObject feed : JSONUtil.objects(json, "feeds")) {
-      processFeed(list, JSONUtil.str(feed, "url"));
+    for (JsonObject feed : JsonUtilities.objects(json, "feeds")) {
+      processFeed(list, JsonUtilities.str(feed, "url"));
     }
     
     return list;
diff --git a/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/misc/NpmPackageVersionConverter.java b/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/misc/NpmPackageVersionConverter.java
index de4ca9113..eb50e9479 100644
--- a/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/misc/NpmPackageVersionConverter.java
+++ b/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/misc/NpmPackageVersionConverter.java
@@ -13,7 +13,7 @@ import org.hl7.fhir.convertors.advisors.impl.BaseAdvisor_30_50;
 import org.hl7.fhir.convertors.factory.*;
 import org.hl7.fhir.utilities.TextFile;
 import org.hl7.fhir.utilities.VersionUtilities;
-import org.hl7.fhir.utilities.json.JSONUtil;
+import org.hl7.fhir.utilities.json.JsonUtilities;
 import org.hl7.fhir.utilities.json.JsonTrackingParser;
 import org.hl7.fhir.utilities.npm.NpmPackageIndexBuilder;
 
@@ -167,7 +167,7 @@ public class NpmPackageVersionConverter {
   private byte[] convertPackage(byte[] cnt) throws IOException {
     JsonObject json = JsonTrackingParser.parseJson(cnt);
     currentVersion = json.getAsJsonArray("fhirVersions").get(0).getAsString();
-    String name = JSONUtil.str(json, "name");
+    String name = JsonUtilities.str(json, "name");
     json.remove("name");
     json.addProperty("name", name + "." + vCode);
     json.remove("fhirVersions");
diff --git a/org.hl7.fhir.r4b/src/main/java/org/hl7/fhir/r4b/elementmodel/SHCParser.java b/org.hl7.fhir.r4b/src/main/java/org/hl7/fhir/r4b/elementmodel/SHCParser.java
index a8d912a68..a58921e3a 100644
--- a/org.hl7.fhir.r4b/src/main/java/org/hl7/fhir/r4b/elementmodel/SHCParser.java
+++ b/org.hl7.fhir.r4b/src/main/java/org/hl7/fhir/r4b/elementmodel/SHCParser.java
@@ -22,7 +22,7 @@ import org.hl7.fhir.r4b.formats.IParser.OutputStyle;
 import org.hl7.fhir.utilities.TextFile;
 import org.hl7.fhir.utilities.Utilities;
 import org.hl7.fhir.utilities.VersionUtilities;
-import org.hl7.fhir.utilities.json.JSONUtil;
+import org.hl7.fhir.utilities.json.JsonUtilities;
 import org.hl7.fhir.utilities.json.JsonTrackingParser;
 import org.hl7.fhir.utilities.json.JsonTrackingParser.LocationData;
 import org.hl7.fhir.utilities.validation.ValidationMessage.IssueSeverity;
@@ -73,7 +73,7 @@ public class SHCParser extends ParserBase {
        int i = 0;
        for (JsonElement e : arr) {
          if (!(e instanceof JsonPrimitive)) {
-           logError(line(e), col(e), "$.verifiableCredential["+i+"]", IssueType.STRUCTURE, "Wrong Property verifiableCredential in JSON Payload. Expected : String but found "+JSONUtil.type(e), IssueSeverity.ERROR);                
+           logError(line(e), col(e), "$.verifiableCredential["+i+"]", IssueType.STRUCTURE, "Wrong Property verifiableCredential in JSON Payload. Expected : String but found "+JsonUtilities.type(e), IssueSeverity.ERROR);                
          } else {
            list.add(e.getAsString());
          }
@@ -117,7 +117,7 @@ public class SHCParser extends ParserBase {
       int i = 0;
       for (JsonElement e : type) {
         if (!(e instanceof JsonPrimitive)) {
-          logError(line(e), col(e), path+".type["+i+"]", IssueType.STRUCTURE, "Wrong Property Type in JSON Payload. Expected : String but found "+JSONUtil.type(e), IssueSeverity.ERROR);
+          logError(line(e), col(e), path+".type["+i+"]", IssueType.STRUCTURE, "Wrong Property Type in JSON Payload. Expected : String but found "+JsonUtilities.type(e), IssueSeverity.ERROR);
         } else {
           types.add(e.getAsString());
         }
@@ -171,7 +171,7 @@ public class SHCParser extends ParserBase {
   private boolean checkProperty(JsonObject obj, String path, String name, boolean required, String type) {
     JsonElement e = obj.get(name);
     if (e != null) {
-      String t = JSONUtil.type(e);
+      String t = JsonUtilities.type(e);
       if (!type.equals(t)) {
         logError(line(e), col(e), path+"."+name, IssueType.STRUCTURE, "Wrong Property Type in JSON Payload. Expected : "+type+" but found "+t, IssueSeverity.ERROR);                
       } else {
@@ -275,7 +275,7 @@ public class SHCParser extends ParserBase {
     }
     JWT res = new JWT();
     res.header = JsonTrackingParser.parseJson(headerJson);
-    if ("DEF".equals(JSONUtil.str(res.header, "zip"))) {
+    if ("DEF".equals(JsonUtilities.str(res.header, "zip"))) {
       payloadJson = inflate(payloadJson);
     }
     res.payload = JsonTrackingParser.parse(TextFile.bytesToString(payloadJson), res.map, true);
diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/conformance/ProfileUtilities.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/conformance/ProfileUtilities.java
index 3f5d3e0a1..a1d4f6230 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/conformance/ProfileUtilities.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/conformance/ProfileUtilities.java
@@ -3744,7 +3744,7 @@ public class ProfileUtilities extends TranslatingUtilities {
       }
     } else if (Utilities.isAbsoluteUrl(u)) {
       StructureDefinition sd = context.fetchResource(StructureDefinition.class, u);
-      if (sd != null) {
+      if (sd != null && pkp != null) {
         String disp = sd.hasTitle() ? sd.getTitle() : sd.getName();
         String ref = pkp.getLinkForProfile(null, sd.getUrl());
         if (ref != null && ref.contains("|"))
diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/Element.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/Element.java
index f7d2ef3b7..0b0d8c5e6 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/Element.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/Element.java
@@ -1102,11 +1102,13 @@ public class Element extends Base {
   public int countDescendents() {
     if (descendentCount > 0) {
       return descendentCount;
-    } else {
+    } else if (children != null) {
       descendentCount = children.size();
       for (Element e : children) {
         descendentCount = descendentCount + e.countDescendents();
       }
+    } else {
+      descendentCount = 0;
     }
     return descendentCount;
   }
diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/SHCParser.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/SHCParser.java
index a7c89f4b0..e52ce7ea8 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/SHCParser.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/SHCParser.java
@@ -22,7 +22,7 @@ import org.hl7.fhir.r5.formats.IParser.OutputStyle;
 import org.hl7.fhir.utilities.TextFile;
 import org.hl7.fhir.utilities.Utilities;
 import org.hl7.fhir.utilities.VersionUtilities;
-import org.hl7.fhir.utilities.json.JSONUtil;
+import org.hl7.fhir.utilities.json.JsonUtilities;
 import org.hl7.fhir.utilities.json.JsonTrackingParser;
 import org.hl7.fhir.utilities.json.JsonTrackingParser.LocationData;
 import org.hl7.fhir.utilities.validation.ValidationMessage.IssueSeverity;
@@ -73,7 +73,7 @@ public class SHCParser extends ParserBase {
        int i = 0;
        for (JsonElement e : arr) {
          if (!(e instanceof JsonPrimitive)) {
-           logError(line(e), col(e), "$.verifiableCredential["+i+"]", IssueType.STRUCTURE, "Wrong Property verifiableCredential in JSON Payload. Expected : String but found "+JSONUtil.type(e), IssueSeverity.ERROR);                
+           logError(line(e), col(e), "$.verifiableCredential["+i+"]", IssueType.STRUCTURE, "Wrong Property verifiableCredential in JSON Payload. Expected : String but found "+JsonUtilities.type(e), IssueSeverity.ERROR);                
          } else {
            list.add(e.getAsString());
          }
@@ -117,7 +117,7 @@ public class SHCParser extends ParserBase {
       int i = 0;
       for (JsonElement e : type) {
         if (!(e instanceof JsonPrimitive)) {
-          logError(line(e), col(e), path+".type["+i+"]", IssueType.STRUCTURE, "Wrong Property Type in JSON Payload. Expected : String but found "+JSONUtil.type(e), IssueSeverity.ERROR);
+          logError(line(e), col(e), path+".type["+i+"]", IssueType.STRUCTURE, "Wrong Property Type in JSON Payload. Expected : String but found "+JsonUtilities.type(e), IssueSeverity.ERROR);
         } else {
           types.add(e.getAsString());
         }
@@ -171,7 +171,7 @@ public class SHCParser extends ParserBase {
   private boolean checkProperty(JsonObject obj, String path, String name, boolean required, String type) {
     JsonElement e = obj.get(name);
     if (e != null) {
-      String t = JSONUtil.type(e);
+      String t = JsonUtilities.type(e);
       if (!type.equals(t)) {
         logError(line(e), col(e), path+"."+name, IssueType.STRUCTURE, "Wrong Property Type in JSON Payload. Expected : "+type+" but found "+t, IssueSeverity.ERROR);                
       } else {
@@ -275,7 +275,7 @@ public class SHCParser extends ParserBase {
     }
     JWT res = new JWT();
     res.header = JsonTrackingParser.parseJson(headerJson);
-    if ("DEF".equals(JSONUtil.str(res.header, "zip"))) {
+    if ("DEF".equals(JsonUtilities.str(res.header, "zip"))) {
       payloadJson = inflate(payloadJson);
     }
     res.payload = JsonTrackingParser.parse(TextFile.bytesToString(payloadJson), res.map, true);
diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/utils/FHIRPathEngine.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/utils/FHIRPathEngine.java
index e56a8f903..0117d2116 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/utils/FHIRPathEngine.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/utils/FHIRPathEngine.java
@@ -262,6 +262,7 @@ public class FHIRPathEngine {
   private ProfileUtilities profileUtilities;
   private String location; // for error messages
   private boolean allowPolymorphicNames;
+  private boolean doImplicitStringConversion;
 
   // if the fhir path expressions are allowed to use constants beyond those defined in the specification
   // the application can implement them by providing a constant resolver 
@@ -447,6 +448,14 @@ public class FHIRPathEngine {
   }
 
 
+  public boolean isDoImplicitStringConversion() {
+    return doImplicitStringConversion;
+  }
+
+  public void setDoImplicitStringConversion(boolean doImplicitStringConversion) {
+    this.doImplicitStringConversion = doImplicitStringConversion;
+  }
+
   // --- public API -------------------------------------------------------
   /**
    * Parse a path for later use using execute
@@ -4211,14 +4220,16 @@ public class FHIRPathEngine {
     List<Base> result = new ArrayList<Base>();
 
     if (focus.size() == 1) {
-      String f = convertToString(focus.get(0));
-      if (Utilities.noString(f)) {
-        result.add(new StringType(""));
-      } else {
-        String t = convertToString(execute(context, focus, expr.getParameters().get(0), true));
-        String r = convertToString(execute(context, focus, expr.getParameters().get(1), true));
-        String n = f.replace(t, r);
-        result.add(new StringType(n));
+      if (focus.get(0).hasType(FHIR_TYPES_STRING) || doImplicitStringConversion) {
+        String f = convertToString(focus.get(0));
+        if (Utilities.noString(f)) {
+          result.add(new StringType(""));
+        } else {
+          String t = convertToString(execute(context, focus, expr.getParameters().get(0), true));
+          String r = convertToString(execute(context, focus, expr.getParameters().get(1), true));
+          String n = f.replace(t, r);
+          result.add(new StringType(n));
+        }
       }
     } else {
       throw makeException(expr, I18nConstants.FHIRPATH_NO_COLLECTION, "replace", focus.size());
@@ -4233,7 +4244,9 @@ public class FHIRPathEngine {
     String repl = convertToString(execute(context, focus, exp.getParameters().get(1), true));
 
     if (focus.size() == 1 && !Utilities.noString(regex)) {
-      result.add(new StringType(convertToString(focus.get(0)).replaceAll(regex, repl)).noExtensions());
+      if (focus.get(0).hasType(FHIR_TYPES_STRING) || doImplicitStringConversion) {
+        result.add(new StringType(convertToString(focus.get(0)).replaceAll(regex, repl)).noExtensions());
+      }
     } else {
       result.add(new StringType(convertToString(focus.get(0))).noExtensions());
     }
@@ -4249,7 +4262,7 @@ public class FHIRPathEngine {
       result.add(new BooleanType(false).noExtensions());
     } else if (Utilities.noString(sw)) {
       result.add(new BooleanType(true).noExtensions());
-    } else {
+    } else if (focus.get(0).hasType(FHIR_TYPES_STRING) || doImplicitStringConversion) {
       if (focus.size() == 1 && !Utilities.noString(sw)) {
         result.add(new BooleanType(convertToString(focus.get(0)).endsWith(sw)).noExtensions());
       } else {
@@ -4919,14 +4932,16 @@ public class FHIRPathEngine {
     String sw = convertToString(execute(context, focus, exp.getParameters().get(0), true));
 
     if (focus.size() == 1 && !Utilities.noString(sw)) {
-      String st = convertToString(focus.get(0));
-      if (Utilities.noString(st)) {
-        result.add(new BooleanType(false).noExtensions());
-      } else {
-        Pattern p = Pattern.compile("(?s)" + sw);
-        Matcher m = p.matcher(st);
-        boolean ok = m.find();
-        result.add(new BooleanType(ok).noExtensions());
+      if (focus.get(0).hasType(FHIR_TYPES_STRING) || doImplicitStringConversion) {
+        String st = convertToString(focus.get(0));
+        if (Utilities.noString(st)) {
+          result.add(new BooleanType(false).noExtensions());
+        } else {
+          Pattern p = Pattern.compile("(?s)" + sw);
+          Matcher m = p.matcher(st);
+          boolean ok = m.find();
+          result.add(new BooleanType(ok).noExtensions());
+        }
       }
     } else {
       result.add(new BooleanType(false).noExtensions());
@@ -4939,14 +4954,16 @@ public class FHIRPathEngine {
     String sw = convertToString(execute(context, focus, exp.getParameters().get(0), true));
 
     if (focus.size() == 1 && !Utilities.noString(sw)) {
-      String st = convertToString(focus.get(0));
-      if (Utilities.noString(st)) {
-        result.add(new BooleanType(false).noExtensions());
-      } else {
-        Pattern p = Pattern.compile("(?s)" + sw);
-        Matcher m = p.matcher(st);
-        boolean ok = m.matches();
-        result.add(new BooleanType(ok).noExtensions());
+      if (focus.get(0).hasType(FHIR_TYPES_STRING) || doImplicitStringConversion) {
+        String st = convertToString(focus.get(0));
+        if (Utilities.noString(st)) {
+          result.add(new BooleanType(false).noExtensions());
+        } else {
+          Pattern p = Pattern.compile("(?s)" + sw);
+          Matcher m = p.matcher(st);
+          boolean ok = m.matches();
+          result.add(new BooleanType(ok).noExtensions());
+        }
       }
     } else {
       result.add(new BooleanType(false).noExtensions());
@@ -4962,7 +4979,7 @@ public class FHIRPathEngine {
       result.add(new BooleanType(false).noExtensions());
     } else if (Utilities.noString(sw)) {
       result.add(new BooleanType(true).noExtensions());
-    } else {
+    } else if (focus.get(0).hasType(FHIR_TYPES_STRING) || doImplicitStringConversion) {
       String st = convertToString(focus.get(0));
       if (Utilities.noString(st)) {
         result.add(new BooleanType(false).noExtensions());
@@ -4981,7 +4998,7 @@ public class FHIRPathEngine {
 
   private List<Base> funcLength(ExecutionContext context, List<Base> focus, ExpressionNode exp) {
     List<Base> result = new ArrayList<Base>();
-    if (focus.size() == 1) {
+    if (focus.size() == 1 && (focus.get(0).hasType(FHIR_TYPES_STRING) || doImplicitStringConversion)) {
       String s = convertToString(focus.get(0));
       result.add(new IntegerType(s.length()).noExtensions());
     }
@@ -5007,7 +5024,7 @@ public class FHIRPathEngine {
       result.add(new BooleanType(false).noExtensions());
     } else if (Utilities.noString(sw)) {
       result.add(new BooleanType(true).noExtensions());
-    } else {
+    } else if (focus.get(0).hasType(FHIR_TYPES_STRING) || doImplicitStringConversion) {
       String s = convertToString(focus.get(0));
       if (s == null) {
         result.add(new BooleanType(false).noExtensions());
@@ -5020,7 +5037,7 @@ public class FHIRPathEngine {
 
   private List<Base> funcLower(ExecutionContext context, List<Base> focus, ExpressionNode exp) throws FHIRException {
     List<Base> result = new ArrayList<Base>();
-    if (focus.size() == 1) {
+    if (focus.size() == 1 && (focus.get(0).hasType(FHIR_TYPES_STRING) || doImplicitStringConversion)) {
       String s = convertToString(focus.get(0));
       if (!Utilities.noString(s)) { 
         result.add(new StringType(s.toLowerCase()).noExtensions());
@@ -5031,7 +5048,7 @@ public class FHIRPathEngine {
 
   private List<Base> funcUpper(ExecutionContext context, List<Base> focus, ExpressionNode exp) throws FHIRException {
     List<Base> result = new ArrayList<Base>();
-    if (focus.size() == 1) {
+    if (focus.size() == 1 && (focus.get(0).hasType(FHIR_TYPES_STRING) || doImplicitStringConversion)) {
       String s = convertToString(focus.get(0));
       if (!Utilities.noString(s)) { 
         result.add(new StringType(s.toUpperCase()).noExtensions());
@@ -5042,7 +5059,7 @@ public class FHIRPathEngine {
 
   private List<Base> funcToChars(ExecutionContext context, List<Base> focus, ExpressionNode exp) throws FHIRException {
     List<Base> result = new ArrayList<Base>();
-    if (focus.size() == 1) {
+    if (focus.size() == 1 && (focus.get(0).hasType(FHIR_TYPES_STRING) || doImplicitStringConversion)) {
       String s = convertToString(focus.get(0));
       for (char c : s.toCharArray()) {  
         result.add(new StringType(String.valueOf(c)).noExtensions());
@@ -5059,7 +5076,7 @@ public class FHIRPathEngine {
       result.add(new IntegerType(0).noExtensions());
     } else if (Utilities.noString(sw)) {
       result.add(new IntegerType(0).noExtensions());
-    } else {
+    } else if (focus.get(0).hasType(FHIR_TYPES_STRING) || doImplicitStringConversion) {
       String s = convertToString(focus.get(0));
       if (s == null) {
         result.add(new IntegerType(0).noExtensions());
@@ -5080,7 +5097,7 @@ public class FHIRPathEngine {
       i2 = Integer.parseInt(n2.get(0).primitiveValue());
     }
 
-    if (focus.size() == 1) {
+    if (focus.size() == 1 && (focus.get(0).hasType(FHIR_TYPES_STRING) || doImplicitStringConversion)) {
       String sw = convertToString(focus.get(0));
       String s;
       if (i1 < 0 || i1 >= sw.length()) {
diff --git a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/SimpleHTTPClient.java b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/SimpleHTTPClient.java
index bca68df6a..ee62af742 100644
--- a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/SimpleHTTPClient.java
+++ b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/SimpleHTTPClient.java
@@ -71,7 +71,7 @@ public class SimpleHTTPClient {
     public void checkThrowException() throws IOException {
       if (code >= 300) {
         String filename = Utilities.path("[tmp]", "fhir-http-"+(++counter)+".log");
-        if (content.length == 0) {
+        if (content == null || content.length == 0) {
           throw new IOException("Invalid HTTP response "+code+" from "+source+" ("+message+") (no content)");          
         } else {
           TextFile.bytesToFile(content, filename);
diff --git a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/Utilities.java b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/Utilities.java
index 96aa35479..5f29390ad 100644
--- a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/Utilities.java
+++ b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/Utilities.java
@@ -1333,6 +1333,30 @@ public class Utilities {
     return false;
   }
 
+  public static boolean endsWithInList(String s, String... list) {
+    if (s == null) {
+      return false;
+    }
+    for (String l : list) {
+      if (s.endsWith(l)) {
+        return true;
+      }
+    }
+    return false;
+  }
+  
+  public static boolean endsWithInList(String s, Collection<String> list) {
+    if (s == null) {
+      return false;
+    }
+    for (String l : list) {
+      if (s.endsWith(l)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
   public static final int ONE_MB = 1024;
   public static final String GB = "Gb";
   public static final String MB = "Mb";
diff --git a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/json/JSONUtil.java b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/json/JsonUtilities.java
similarity index 93%
rename from org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/json/JSONUtil.java
rename to org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/json/JsonUtilities.java
index 99e7fc77b..955870333 100644
--- a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/json/JSONUtil.java
+++ b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/json/JsonUtilities.java
@@ -45,7 +45,7 @@ import com.google.gson.JsonNull;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonPrimitive;
 
-public class JSONUtil {
+public class JsonUtilities {
 
   public static JsonObject parse(String json) throws IOException {
     return JsonTrackingParser.parseJson(json);    
@@ -155,4 +155,15 @@ public class JSONUtil {
     return "String";
   }
 
+  public static List<String> strings(JsonArray arr) {
+    List<String> res = new ArrayList<String>();
+    for (int i = 0; i < arr.size(); i++) {
+      JsonElement n = arr.get(i);
+      if (n.isJsonPrimitive()) {
+        res.add(n.getAsString());
+      }
+    }
+    return res;
+  }
+
 }
\ No newline at end of file
diff --git a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/FilesystemPackageCacheManager.java b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/FilesystemPackageCacheManager.java
index b14fc3019..04f29c1b3 100644
--- a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/FilesystemPackageCacheManager.java
+++ b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/FilesystemPackageCacheManager.java
@@ -42,7 +42,7 @@ import org.hl7.fhir.utilities.IniFile;
 import org.hl7.fhir.utilities.TextFile;
 import org.hl7.fhir.utilities.Utilities;
 import org.hl7.fhir.utilities.VersionUtilities;
-import org.hl7.fhir.utilities.json.JSONUtil;
+import org.hl7.fhir.utilities.json.JsonUtilities;
 import org.hl7.fhir.utilities.json.JsonTrackingParser;
 import org.hl7.fhir.utilities.npm.NpmPackage.NpmPackageFolder;
 import org.slf4j.Logger;
@@ -414,14 +414,14 @@ public class FilesystemPackageCacheManager extends BasePackageCacheManager imple
             log(" done.");
         }
         pck = loadPackageInfo(packRoot);
-        if (!id.equals(JSONUtil.str(npm.getNpm(), "name")) || !v.equals(JSONUtil.str(npm.getNpm(), "version"))) {
-          if (!id.equals(JSONUtil.str(npm.getNpm(), "name"))) {
-            npm.getNpm().addProperty("original-name", JSONUtil.str(npm.getNpm(), "name"));
+        if (!id.equals(JsonUtilities.str(npm.getNpm(), "name")) || !v.equals(JsonUtilities.str(npm.getNpm(), "version"))) {
+          if (!id.equals(JsonUtilities.str(npm.getNpm(), "name"))) {
+            npm.getNpm().addProperty("original-name", JsonUtilities.str(npm.getNpm(), "name"));
             npm.getNpm().remove("name");
             npm.getNpm().addProperty("name", id);
           }
-          if (!v.equals(JSONUtil.str(npm.getNpm(), "version"))) {
-            npm.getNpm().addProperty("original-version", JSONUtil.str(npm.getNpm(), "version"));
+          if (!v.equals(JsonUtilities.str(npm.getNpm(), "version"))) {
+            npm.getNpm().addProperty("original-version", JsonUtilities.str(npm.getNpm(), "version"));
             npm.getNpm().remove("version");
             npm.getNpm().addProperty("version", v);
           }
@@ -566,8 +566,8 @@ public class FilesystemPackageCacheManager extends BasePackageCacheManager imple
     checkBuildLoaded();
     for (JsonElement n : buildInfo) {
       JsonObject o = (JsonObject) n;
-      if (packageId.equals(JSONUtil.str(o, "package-id"))) {
-        return JSONUtil.str(o, "url");
+      if (packageId.equals(JsonUtilities.str(o, "package-id"))) {
+        return JsonUtilities.str(o, "url");
       }
     }
     return null;
@@ -577,8 +577,8 @@ public class FilesystemPackageCacheManager extends BasePackageCacheManager imple
     checkBuildLoaded();
     for (JsonElement n : buildInfo) {
       JsonObject o = (JsonObject) n;
-      if (!specList.containsKey(JSONUtil.str(o, "package-id"))) {
-        specList.put(JSONUtil.str(o, "package-id"), JSONUtil.str(o, "url"));
+      if (!specList.containsKey(JsonUtilities.str(o, "package-id"))) {
+        specList.put(JsonUtilities.str(o, "package-id"), JsonUtilities.str(o, "url"));
       }
     }
   }
@@ -604,8 +604,8 @@ public class FilesystemPackageCacheManager extends BasePackageCacheManager imple
       for (String pf : listPackages()) {
         if (new File(Utilities.path(cacheFolder, pf, "package", "package.json")).exists()) {
           JsonObject npm = JsonTrackingParser.parseJsonFile(Utilities.path(cacheFolder, pf, "package", "package.json"));
-          if (canonicalUrl.equals(JSONUtil.str(npm, "canonical"))) {
-            return JSONUtil.str(npm, "name");
+          if (canonicalUrl.equals(JsonUtilities.str(npm, "canonical"))) {
+            return JsonUtilities.str(npm, "name");
           }
         }
       }
@@ -624,14 +624,14 @@ public class FilesystemPackageCacheManager extends BasePackageCacheManager imple
     if (buildInfo != null) {
       for (JsonElement n : buildInfo) {
         JsonObject o = (JsonObject) n;
-        if (canonical.equals(JSONUtil.str(o, "url"))) {
-          return JSONUtil.str(o, "package-id");
+        if (canonical.equals(JsonUtilities.str(o, "url"))) {
+          return JsonUtilities.str(o, "package-id");
         }
       }
       for (JsonElement n : buildInfo) {
         JsonObject o = (JsonObject) n;
-        if (JSONUtil.str(o, "url").startsWith(canonical + "/ImplementationGuide/")) {
-          return JSONUtil.str(o, "package-id");
+        if (JsonUtilities.str(o, "url").startsWith(canonical + "/ImplementationGuide/")) {
+          return JsonUtilities.str(o, "package-id");
         }
       }
     }
@@ -644,7 +644,7 @@ public class FilesystemPackageCacheManager extends BasePackageCacheManager imple
     try {
       String url = ciList.get(id);
       JsonObject json = JsonTrackingParser.fetchJson(Utilities.pathURL(url, "package.manifest.json"));
-      String currDate = JSONUtil.str(json, "date");
+      String currDate = JsonUtilities.str(json, "date");
       String packDate = p.date();
       if (!currDate.equals(packDate)) {
         return null; // nup, we need a new copy
@@ -740,13 +740,13 @@ public class FilesystemPackageCacheManager extends BasePackageCacheManager imple
         throw new FHIRException("Error fetching package directly (" + pv + "), or fetching package list for " + id + " from " + pu + ": " + e1.getMessage(), e1);
       }
     }
-    if (!id.equals(JSONUtil.str(json, "package-id")))
-      throw new FHIRException("Package ids do not match in " + pu + ": " + id + " vs " + JSONUtil.str(json, "package-id"));
+    if (!id.equals(JsonUtilities.str(json, "package-id")))
+      throw new FHIRException("Package ids do not match in " + pu + ": " + id + " vs " + JsonUtilities.str(json, "package-id"));
     for (JsonElement e : json.getAsJsonArray("list")) {
       JsonObject vo = (JsonObject) e;
-      if (v.equals(JSONUtil.str(vo, "version"))) {
-        aurl = Utilities.pathURL(JSONUtil.str(vo, "path"), "package.tgz");
-        String u = Utilities.pathURL(JSONUtil.str(vo, "path"), "package.tgz");
+      if (v.equals(JsonUtilities.str(vo, "version"))) {
+        aurl = Utilities.pathURL(JsonUtilities.str(vo, "path"), "package.tgz");
+        String u = Utilities.pathURL(JsonUtilities.str(vo, "path"), "package.tgz");
         return new InputStreamWithSrc(fetchFromUrlSpecific(u, true), u, v);
       }
     }
@@ -771,12 +771,12 @@ public class FilesystemPackageCacheManager extends BasePackageCacheManager imple
     }
     String pu = Utilities.pathURL(url, "package-list.json");
     JsonObject json = JsonTrackingParser.fetchJson(pu);
-    if (!id.equals(JSONUtil.str(json, "package-id")))
-      throw new FHIRException("Package ids do not match in " + pu + ": " + id + " vs " + JSONUtil.str(json, "package-id"));
+    if (!id.equals(JsonUtilities.str(json, "package-id")))
+      throw new FHIRException("Package ids do not match in " + pu + ": " + id + " vs " + JsonUtilities.str(json, "package-id"));
     for (JsonElement e : json.getAsJsonArray("list")) {
       JsonObject vo = (JsonObject) e;
-      if (JSONUtil.bool(vo, "current")) {
-        return JSONUtil.str(vo, "version");
+      if (JsonUtilities.bool(vo, "current")) {
+        return JsonUtilities.str(vo, "version");
       }
     }
 
diff --git a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/NpmPackage.java b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/NpmPackage.java
index 876cbb35a..6bcd50c7a 100644
--- a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/NpmPackage.java
+++ b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/NpmPackage.java
@@ -67,7 +67,7 @@ import org.hl7.fhir.utilities.SimpleHTTPClient;
 import org.hl7.fhir.utilities.TextFile;
 import org.hl7.fhir.utilities.Utilities;
 import org.hl7.fhir.utilities.SimpleHTTPClient.HTTPResult;
-import org.hl7.fhir.utilities.json.JSONUtil;
+import org.hl7.fhir.utilities.json.JsonUtilities;
 import org.hl7.fhir.utilities.json.JsonTrackingParser;
 import org.hl7.fhir.utilities.npm.NpmPackage.ITransformingLoader;
 import org.hl7.fhir.utilities.npm.NpmPackage.PackageResourceInformationSorter;
@@ -113,12 +113,12 @@ public class NpmPackage {
     
     public PackageResourceInformation(String root, JsonObject fi) throws IOException {
       super();
-      id = JSONUtil.str(fi, "id");
-      type = JSONUtil.str(fi, "resourceType");
-      url = JSONUtil.str(fi, "url");
-      version = JSONUtil.str(fi, "version");
-      filename = Utilities.path(root, JSONUtil.str(fi, "filename"));
-      supplements = JSONUtil.str(fi, "supplements");
+      id = JsonUtilities.str(fi, "id");
+      type = JsonUtilities.str(fi, "resourceType");
+      url = JsonUtilities.str(fi, "url");
+      version = JsonUtilities.str(fi, "version");
+      filename = Utilities.path(root, JsonUtilities.str(fi, "filename"));
+      supplements = JsonUtilities.str(fi, "supplements");
     }
     public String getId() {
       return id;
@@ -144,8 +144,8 @@ public class NpmPackage {
 
     @Override
     public int compare(JsonObject o0, JsonObject o1) {
-      String v0 = JSONUtil.str(o0, "version"); 
-      String v1 = JSONUtil.str(o1, "version"); 
+      String v0 = JsonUtilities.str(o0, "version"); 
+      String v1 = JsonUtilities.str(o1, "version"); 
       return v0.compareTo(v1);
     }
   }
@@ -185,8 +185,8 @@ public class NpmPackage {
       this.index = index;
       for (JsonElement e : index.getAsJsonArray("files")) {
         JsonObject file = (JsonObject) e;
-        String type = JSONUtil.str(file, "resourceType");
-        String name = JSONUtil.str(file, "filename");
+        String type = JsonUtilities.str(file, "resourceType");
+        String name = JsonUtilities.str(file, "filename");
         if (!types.containsKey(type))
           types.put(type, new ArrayList<>());
         types.get(type).add(name);
@@ -326,7 +326,8 @@ public class NpmPackage {
   }
 
   public static boolean isInternalExemptFile(File f) {
-    return Utilities.existsInList(f.getName(), ".git", ".svn") || Utilities.existsInList(f.getName(), "package-list.json");
+    return Utilities.existsInList(f.getName(), ".git", ".svn", ".DS_Store") || Utilities.existsInList(f.getName(), "package-list.json") ||
+        Utilities.endsWithInList(f.getName(), ".tgz");
   }
 
   private void loadSubFolders(String rootPath, File dir) throws IOException {
@@ -552,7 +553,7 @@ public class NpmPackage {
       if (folder.index != null) {
         for (JsonElement e : folder.index.getAsJsonArray("files")) {
           JsonObject fi = e.getAsJsonObject();
-          if (Utilities.existsInList(JSONUtil.str(fi, "resourceType"), types)) {
+          if (Utilities.existsInList(JsonUtilities.str(fi, "resourceType"), types)) {
             res.add(new PackageResourceInformation(folder.folder.getAbsolutePath(), fi));
           }
         }
@@ -625,19 +626,19 @@ public class NpmPackage {
     List<JsonObject> matches = new ArrayList<>();
     for (JsonElement e : f.index.getAsJsonArray("files")) {
       JsonObject file = (JsonObject) e;
-      if (canonical.equals(JSONUtil.str(file, "url"))) {
-        if (version != null && version.equals(JSONUtil.str(file, "version"))) {
-          return load("package", JSONUtil.str(file, "filename"));
+      if (canonical.equals(JsonUtilities.str(file, "url"))) {
+        if (version != null && version.equals(JsonUtilities.str(file, "version"))) {
+          return load("package", JsonUtilities.str(file, "filename"));
         } else if (version == null) {
           matches.add(file);
         }
       }
       if (matches.size() > 0) {
         if (matches.size() == 1) {
-          return load("package", JSONUtil.str(matches.get(0), "filename"));          
+          return load("package", JsonUtilities.str(matches.get(0), "filename"));          
         } else {
           Collections.sort(matches, new IndexVersionSorter());
-          return load("package", JSONUtil.str(matches.get(matches.size()-1), "filename"));          
+          return load("package", JsonUtilities.str(matches.get(matches.size()-1), "filename"));          
         }
       }
     }
@@ -697,7 +698,7 @@ public class NpmPackage {
    * @return
    */
   public String name() {
-    return JSONUtil.str(npm, "name");
+    return JsonUtilities.str(npm, "name");
   }
 
   /**
@@ -705,15 +706,15 @@ public class NpmPackage {
    * @return
    */
   public String id() {
-    return JSONUtil.str(npm, "name");
+    return JsonUtilities.str(npm, "name");
   }
 
   public String date() {
-    return JSONUtil.str(npm, "date");
+    return JsonUtilities.str(npm, "date");
   }
 
   public String canonical() {
-    return JSONUtil.str(npm, "canonical");
+    return JsonUtilities.str(npm, "canonical");
   }
 
   /**
@@ -721,7 +722,7 @@ public class NpmPackage {
    * @return
    */
   public String version() {
-    return JSONUtil.str(npm, "version");
+    return JsonUtilities.str(npm, "version");
   }
 
   /**
@@ -729,11 +730,11 @@ public class NpmPackage {
    * @return
    */
   public String fhirVersion() {
-    if ("hl7.fhir.core".equals(JSONUtil.str(npm, "name")))
-      return JSONUtil.str(npm, "version");
-    else if (JSONUtil.str(npm, "name").startsWith("hl7.fhir.r2.") || JSONUtil.str(npm, "name").startsWith("hl7.fhir.r2b.") || JSONUtil.str(npm, "name").startsWith("hl7.fhir.r3.") || 
-        JSONUtil.str(npm, "name").startsWith("hl7.fhir.r4.") || JSONUtil.str(npm, "name").startsWith("hl7.fhir.r4b.") || JSONUtil.str(npm, "name").startsWith("hl7.fhir.r5."))
-      return JSONUtil.str(npm, "version");
+    if ("hl7.fhir.core".equals(JsonUtilities.str(npm, "name")))
+      return JsonUtilities.str(npm, "version");
+    else if (JsonUtilities.str(npm, "name").startsWith("hl7.fhir.r2.") || JsonUtilities.str(npm, "name").startsWith("hl7.fhir.r2b.") || JsonUtilities.str(npm, "name").startsWith("hl7.fhir.r3.") || 
+        JsonUtilities.str(npm, "name").startsWith("hl7.fhir.r4.") || JsonUtilities.str(npm, "name").startsWith("hl7.fhir.r4b.") || JsonUtilities.str(npm, "name").startsWith("hl7.fhir.r5."))
+      return JsonUtilities.str(npm, "version");
     else {
       JsonObject dep = null;
       if (npm.has("dependencies") && npm.get("dependencies").isJsonObject()) {
@@ -778,11 +779,11 @@ public class NpmPackage {
   }
 
   public String type() {
-    return JSONUtil.str(npm, "type");
+    return JsonUtilities.str(npm, "type");
   }
 
   public String description() {
-    return JSONUtil.str(npm, "description");
+    return JsonUtilities.str(npm, "description");
   }
 
   public String getPath() {
@@ -800,24 +801,24 @@ public class NpmPackage {
   }
 
   public String homepage() {
-    return JSONUtil.str(npm, "homepage");
+    return JsonUtilities.str(npm, "homepage");
   }
 
   public String url() {
-    return JSONUtil.str(npm, "url");
+    return JsonUtilities.str(npm, "url");
   }
 
 
   public String title() {
-    return JSONUtil.str(npm, "title");
+    return JsonUtilities.str(npm, "title");
   }
 
   public String toolsVersion() {
-    return JSONUtil.str(npm, "tools-version");
+    return JsonUtilities.str(npm, "tools-version");
   }
 
   public String license() {
-    return JSONUtil.str(npm, "license");
+    return JsonUtilities.str(npm, "license");
   }
 
   //  /**
@@ -833,7 +834,7 @@ public class NpmPackage {
     if (npm.has("url") && npm.get("url").isJsonPrimitive()) {
       return PackageHacker.fixPackageUrl(npm.get("url").getAsString());
     } else {
-      return JSONUtil.str(npm, "canonical");
+      return JsonUtilities.str(npm, "canonical");
     }
   }
 
@@ -842,8 +843,8 @@ public class NpmPackage {
     JsonArray files = f.index.getAsJsonArray("files");
     for (JsonElement e : files) {
       JsonObject i = (JsonObject) e;
-      if (type.equals(JSONUtil.str(i, "resourceType")) && id.equals(JSONUtil.str(i, "id"))) {
-        return load("package", JSONUtil.str(i, "filename"));
+      if (type.equals(JsonUtilities.str(i, "resourceType")) && id.equals(JsonUtilities.str(i, "id"))) {
+        return load("package", JsonUtilities.str(i, "filename"));
       }
     }
     return null;
@@ -858,8 +859,8 @@ public class NpmPackage {
       JsonArray files = f.index.getAsJsonArray("files");
       for (JsonElement e : files) {
         JsonObject i = (JsonObject) e;
-        if (type.equals(JSONUtil.str(i, "resourceType")) && id.equals(JSONUtil.str(i, "id"))) {
-          return load("example", JSONUtil.str(i, "filename"));
+        if (type.equals(JsonUtilities.str(i, "resourceType")) && id.equals(JsonUtilities.str(i, "id"))) {
+          return load("example", JsonUtilities.str(i, "filename"));
         }
       }
     }
@@ -1094,7 +1095,7 @@ public class NpmPackage {
   }
 
   public boolean isCore() {
-    return Utilities.existsInList(JSONUtil.str(npm, "type"), "fhir.core", "Core");
+    return Utilities.existsInList(JsonUtilities.str(npm, "type"), "fhir.core", "Core");
   }
 
   public boolean hasCanonical(String url) {
@@ -1107,8 +1108,8 @@ public class NpmPackage {
     if (folder != null) {
       for (JsonElement e : folder.index.getAsJsonArray("files")) {
         JsonObject o = (JsonObject) e;
-        if (u.equals(JSONUtil.str(o, "url"))) {
-          if (v == null || v.equals(JSONUtil.str(o, "version"))) {
+        if (u.equals(JsonUtilities.str(o, "url"))) {
+          if (v == null || v.equals(JsonUtilities.str(o, "version"))) {
             return true;
           }
         }
@@ -1126,7 +1127,7 @@ public class NpmPackage {
     if (Utilities.existsInList(name(), "fhir.test.data.r2", "fhir.test.data.r3", "fhir.test.data.r4", "fhir.tx.support.r2", "fhir.tx.support.r3", "fhir.tx.support.r4", "us.nlm.vsac")) {
       return true;
     }
-    if (JSONUtil.bool(npm, "lazy-load")) {
+    if (JsonUtilities.bool(npm, "lazy-load")) {
       return true;
     }
     if (!hasFile("other", "spec.internals")) {
@@ -1136,7 +1137,7 @@ public class NpmPackage {
   }
 
   public boolean isNotForPublication() {
-    return JSONUtil.bool(npm, "notForPublication");
+    return JsonUtilities.bool(npm, "notForPublication");
  }
 
   public InputStream load(PackageResourceInformation p) throws FileNotFoundException {
diff --git a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/PackageClient.java b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/PackageClient.java
index 68e89012b..71e0fac17 100644
--- a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/PackageClient.java
+++ b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/PackageClient.java
@@ -9,7 +9,7 @@ import org.hl7.fhir.utilities.SimpleHTTPClient.HTTPResult;
 import org.hl7.fhir.utilities.TextFile;
 import org.hl7.fhir.utilities.Utilities;
 import org.hl7.fhir.utilities.VersionUtilities;
-import org.hl7.fhir.utilities.json.JSONUtil;
+import org.hl7.fhir.utilities.json.JsonUtilities;
 import org.hl7.fhir.utilities.json.JsonTrackingParser;
 
 import java.io.ByteArrayInputStream;
@@ -81,12 +81,12 @@ public class PackageClient {
       if (versions != null) {
         for (String v : sorted(versions.keySet())) {
           JsonObject obj = versions.getAsJsonObject(v);
-          res.add(new PackageInfo(JSONUtil.str(obj, "Name", "name"),
-            JSONUtil.str(obj, "Version", "version"),
-            JSONUtil.str(obj, "FhirVersion", "fhirVersion"),
-            JSONUtil.str(obj, "Description", "description"),
-            JSONUtil.str(obj, "url"),
-            JSONUtil.str(obj, "canonical"),
+          res.add(new PackageInfo(JsonUtilities.str(obj, "Name", "name"),
+            JsonUtilities.str(obj, "Version", "version"),
+            JsonUtilities.str(obj, "FhirVersion", "fhirVersion"),
+            JsonUtilities.str(obj, "Description", "description"),
+            JsonUtilities.str(obj, "url"),
+            JsonUtilities.str(obj, "canonical"),
             address));
         }
       }
@@ -121,12 +121,12 @@ public class PackageClient {
       JsonArray json = fetchJsonArray(Utilities.pathURL(address, "catalog?")+params.toString());
       for (JsonElement e : json) {
         JsonObject obj = (JsonObject) e;
-        res.add(new PackageInfo(JSONUtil.str(obj, "Name", "name"),
-          JSONUtil.str(obj, "Version", "version"),
-          JSONUtil.str(obj, "FhirVersion", "fhirVersion"),
-          JSONUtil.str(obj, "Description", "description"),
-          JSONUtil.str(obj, "url"),
-          JSONUtil.str(obj, "canonical"),
+        res.add(new PackageInfo(JsonUtilities.str(obj, "Name", "name"),
+          JsonUtilities.str(obj, "Version", "version"),
+          JsonUtilities.str(obj, "FhirVersion", "fhirVersion"),
+          JsonUtilities.str(obj, "Description", "description"),
+          JsonUtilities.str(obj, "url"),
+          JsonUtilities.str(obj, "canonical"),
           address));
       }
     } catch (IOException e1) {
@@ -192,10 +192,10 @@ public class PackageClient {
   }
 
   protected PackageInfo getPackageInfoFromJSON(JsonObject o, String name, String canonical, String fhirVersion) {
-      String id = JSONUtil.str(o, "npm-name");
-      String pname = JSONUtil.str(o, "name");
-      String pcanonical = JSONUtil.str(o, "canonical");
-      String description = JSONUtil.str(o, "description");
+      String id = JsonUtilities.str(o, "npm-name");
+      String pname = JsonUtilities.str(o, "name");
+      String pcanonical = JsonUtilities.str(o, "canonical");
+      String description = JsonUtilities.str(o, "description");
       boolean ok = true;
       if (ok && !Utilities.noString(name)) {
         ok = (pname != null && pname.contains(name)) || (description != null && description.contains(name)) || (id != null && id.contains(name));
@@ -209,15 +209,15 @@ public class PackageClient {
 
       if (ok) {
         // if we can find something...
-        for (JsonObject e : JSONUtil.objects(o, "editions")) {
-          if (fhirVersion == null || fhirVersion.equals(JSONUtil.str(e, "fhir-version"))) {
-            String v = JSONUtil.str(e, "ig-version");
+        for (JsonObject e : JsonUtilities.objects(o, "editions")) {
+          if (fhirVersion == null || fhirVersion.equals(JsonUtilities.str(e, "fhir-version"))) {
+            String v = JsonUtilities.str(e, "ig-version");
             if (version == null || VersionUtilities.isThisOrLater(version, v)) {
               version = v;
               fVersion = e.getAsJsonArray("fhir-version").get(0).getAsString();
-              url = JSONUtil.str(e, "url");
+              url = JsonUtilities.str(e, "url");
 
-              String npmPackage = JSONUtil.str(e, "package");
+              String npmPackage = JsonUtilities.str(e, "package");
               if (npmPackage != null && id == null) {
                 id = npmPackage.substring(0, npmPackage.indexOf("#"));
               }
@@ -231,7 +231,7 @@ public class PackageClient {
   public List<PackageInfo> listFromRegistry(String name, String canonical, String fhirVersion) throws IOException {
     List<PackageInfo> result = new ArrayList<>();
     JsonObject packages = JsonTrackingParser.fetchJson("https://raw.githubusercontent.com/FHIR/ig-registry/master/fhir-ig-list.json?nocache=" + System.currentTimeMillis());
-    for (JsonObject o : JSONUtil.objects(packages, "guides")) {
+    for (JsonObject o : JsonUtilities.objects(packages, "guides")) {
       if (o.has("canonical")) {
       final PackageInfo packageInfo = getPackageInfoFromJSON(o, name, canonical, fhirVersion);
         if (packageInfo.getVersion() != null) {
@@ -249,7 +249,7 @@ public class PackageClient {
       JsonArray json = fetchJsonArray(Utilities.pathURL(address, "catalog?")+params.toString());
       for (JsonElement e : json) {
         JsonObject obj = (JsonObject) e;
-        list.add(JSONUtil.str(obj, "Name", "name"));
+        list.add(JsonUtilities.str(obj, "Name", "name"));
       }
     } catch (IOException e1) {
     }
diff --git a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/PackageHacker.java b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/PackageHacker.java
index 3c3d6b110..8af672e06 100644
--- a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/PackageHacker.java
+++ b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/PackageHacker.java
@@ -5,6 +5,7 @@ import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
@@ -27,7 +28,7 @@ public class PackageHacker {
   private static boolean useSecureReferences = false;
   
   public static void main(String[] args) throws FileNotFoundException, IOException {
-    new PackageHacker().edit("/Users/grahamegrieve/work/test-cases/validator/swiss.mednet.fhir#0.5.0.tgz");
+    new PackageHacker().edit(args[0]);
   }
 
   private void edit(String name) throws FileNotFoundException, IOException {
@@ -39,7 +40,14 @@ public class PackageHacker {
     System.out.println("Altering Package "+f.getAbsolutePath());
     System.out.println(nice(pck.getNpm()));
     
-    change(pck.getNpm(), pck.getFolders().get("package").getContent());
+    change(pck.getNpm());
+    fixContent(pck.getFolders().get("package").getContent());
+    if (pck.getFolders().containsKey("openapi")) {
+      fixContent(pck.getFolders().get("openapi").getContent());
+    }
+    if (pck.getFolders().containsKey("xml")) {
+      fixContent(pck.getFolders().get("xml").getContent());
+    }
     
     System.out.println("Revised Package");
     System.out.println("=======================");
@@ -53,11 +61,16 @@ public class PackageHacker {
     }   
   }
 
+  private void fixContent(Map<String, byte[]> content) {
+    fixVersionInContent(content);
+
+  }
+
   private String nice(JsonObject json) {
     return new GsonBuilder().setPrettyPrinting().create().toJson(json);
   }
 
-  private void change(JsonObject npm, Map<String, byte[]> content) throws FileNotFoundException, IOException {
+  private void change(JsonObject npm) throws FileNotFoundException, IOException {
     fixVersions(npm);
 //    npm.remove("notForPublication");
 //    npm.addProperty("url", "http://hl7.org/fhir/us/carin-rtpbc/STU1");
@@ -67,21 +80,36 @@ public class PackageHacker {
 //    npm.addProperty("canonical", "http://hl7.org/fhir/us/davinci-drug-formulary");
 ////    npm.remove("description");
 ////    npm.addProperty("description", "Group Wrapper that includes all the R4 packages");
-//    npm.remove("url");
-//    npm.addProperty("url", "https://terminology.hl7.org/1.0.0/");
-    npm.remove("dependencies");
-    JsonObject dep = new JsonObject();
-    npm.add("dependencies", dep);
-    dep.addProperty("hl7.fhir.r4.core", "4.0.1");
-    dep.addProperty("ch.fhir.ig.ch-core", "2.0.0");
-    dep.addProperty("ch.fhir.ig.ch-epr-term", "2.0.4");
-    dep.addProperty("ch.fhir.ig.ch-emed","current");
+    npm.remove("url");
+    npm.addProperty("url", "http://hl7.org/fhir/R4B");
+    npm.remove("homepage");
+    npm.addProperty("homepage", "http://hl7.org/fhir/R4B");
+//    npm.remove("dependencies");
+//    JsonObject dep = new JsonObject();
+//    npm.add("dependencies", dep);
+//    dep.addProperty("hl7.fhir.r4.core", "4.0.1");
+//    dep.addProperty("ch.fhir.ig.ch-core", "2.0.0");
+//    dep.addProperty("ch.fhir.ig.ch-epr-term", "2.0.4");
+//    dep.addProperty("ch.fhir.ig.ch-emed","current");
 
 //    dep.addProperty("hl7.fhir.r4.examples", "4.0.1");
 //    dep.addProperty("hl7.fhir.r4.expansions", "4.0.1");
 //    dep.addProperty("hl7.fhir.r4.elements", "4.0.1");
   }
 
+  private void fixVersionInContent(Map<String, byte[]> content) {
+    for (String n : content.keySet()) {
+      if (n.endsWith(".json") || n.endsWith(".xml") || n.endsWith(".xsd")) {
+        String json = new String(content.get(n));
+        if (json.contains("4.3.0-cibuild") && !json.contains("4.3.0-snapshot1")) {
+          json = json.replace("4.3.0-cibuild", "4.3.0");
+          content.put(n, json.getBytes(StandardCharsets.UTF_8));
+        }
+      }
+    }
+    
+  }
+
   private void fixVersions(JsonObject npm) {
     npm.remove("fhirVersions");
     JsonArray a = new JsonArray();
diff --git a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/PackageScanner.java b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/PackageScanner.java
index d08489940..e2fb6001f 100644
--- a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/PackageScanner.java
+++ b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/PackageScanner.java
@@ -9,7 +9,7 @@ import java.util.Set;
 
 import org.hl7.fhir.utilities.TextFile;
 import org.hl7.fhir.utilities.Utilities;
-import org.hl7.fhir.utilities.json.JSONUtil;
+import org.hl7.fhir.utilities.json.JsonUtilities;
 import org.hl7.fhir.utilities.json.JsonTrackingParser;
 
 import com.google.gson.JsonObject;
@@ -63,7 +63,7 @@ public class PackageScanner {
             } catch (Exception e) {
               fv = "--";
             }
-            output.add(pck.name()+"\t"+pck.version()+"\t"+pck.canonical()+"\t"+fv+'\t'+pck.fhirVersionList()+'\t'+JSONUtil.str(json, "kind")+'\t'+JSONUtil.str(json, "type")+'\t'+JsonTrackingParser.writeDense(json));          } catch (Exception e) {
+            output.add(pck.name()+"\t"+pck.version()+"\t"+pck.canonical()+"\t"+fv+'\t'+pck.fhirVersionList()+'\t'+JsonUtilities.str(json, "kind")+'\t'+JsonUtilities.str(json, "type")+'\t'+JsonTrackingParser.writeDense(json));          } catch (Exception e) {
             System.out.println("Error acessing "+pi.getId()+"#"+piv.getVersion()+": "+e.getMessage());
             e.printStackTrace();
           }
diff --git a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/ResourceRenamer.java b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/ResourceRenamer.java
new file mode 100644
index 000000000..700aeaece
--- /dev/null
+++ b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/npm/ResourceRenamer.java
@@ -0,0 +1,59 @@
+package org.hl7.fhir.utilities.npm;
+
+import java.io.File;
+import java.io.IOException;
+
+import org.hl7.fhir.utilities.Utilities;
+import org.hl7.fhir.utilities.json.JsonUtilities;
+import org.hl7.fhir.utilities.json.JsonTrackingParser;
+
+import com.google.gson.JsonObject;
+
+public class ResourceRenamer {
+
+  public static void main(String[] args) throws IOException {
+    new ResourceRenamer().processArg(new File(args[0]));
+  }
+
+  private void processArg(File file) throws IOException {
+   if (file.isDirectory()) {
+     process(file);
+   } else {
+     unbundle(file);
+   }
+  }
+
+  private void unbundle(File f) throws IOException {
+    JsonObject j = JsonTrackingParser.parseJson(f);
+    for (JsonObject e : JsonUtilities.objects(j, "entry")) {
+      JsonObject r = e.getAsJsonObject("resource");
+      String rt = r.get("resourceType").getAsString();
+      String id = r.get("id").getAsString();
+      String nn = Utilities.path(Utilities.getDirectoryForFile(f.getAbsolutePath()), rt+"-"+id+".json");
+      JsonTrackingParser.write(r, new File(nn), true); 
+    } 
+  }
+
+  private void process(File dir) {
+    
+    for (File f : dir.listFiles()) {
+      if (f.getName().endsWith(".json")) {
+        try {
+          JsonObject j = JsonTrackingParser.parseJson(f);
+          String rt = j.get("resourceType").getAsString();
+          String id = j.get("id").getAsString();
+          String nn = Utilities.path(Utilities.getDirectoryForFile(f.getAbsolutePath()), rt+"-"+id+".json");
+          File nf = new File(nn);
+          if (!nn.equals(f.getAbsolutePath())) {
+            System.out.println("Rename "+f.getName()+" to "+nf.getName());
+            f.renameTo(nf);
+          }
+        } catch (Exception e) {
+          System.out.println("Error Processing "+f.getName()+" : "+e.getMessage());
+        }
+      }
+    }
+    
+  }
+
+}
diff --git a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/IgLoader.java b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/IgLoader.java
index 63a816ff2..a6c98f888 100644
--- a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/IgLoader.java
+++ b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/IgLoader.java
@@ -24,7 +24,7 @@ import org.hl7.fhir.utilities.IniFile;
 import org.hl7.fhir.utilities.TextFile;
 import org.hl7.fhir.utilities.Utilities;
 import org.hl7.fhir.utilities.VersionUtilities;
-import org.hl7.fhir.utilities.json.JSONUtil;
+import org.hl7.fhir.utilities.json.JsonUtilities;
 import org.hl7.fhir.utilities.json.JsonTrackingParser;
 import org.hl7.fhir.utilities.npm.FilesystemPackageCacheManager;
 import org.hl7.fhir.utilities.npm.NpmPackage;
diff --git a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/ResourceChecker.java b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/ResourceChecker.java
index 1422b9810..c1695232c 100644
--- a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/ResourceChecker.java
+++ b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/ResourceChecker.java
@@ -8,7 +8,7 @@ import org.hl7.fhir.r5.elementmodel.SHCParser.JWT;
 import org.hl7.fhir.r5.utils.structuremap.StructureMapUtilities;
 import org.hl7.fhir.utilities.TextFile;
 import org.hl7.fhir.utilities.Utilities;
-import org.hl7.fhir.utilities.json.JSONUtil;
+import org.hl7.fhir.utilities.json.JsonUtilities;
 import org.hl7.fhir.utilities.json.JsonTrackingParser;
 
 import com.google.gson.JsonObject;
diff --git a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/ValidationEngine.java b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/ValidationEngine.java
index 0f77fdea1..a8e4b5a24 100644
--- a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/ValidationEngine.java
+++ b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/ValidationEngine.java
@@ -158,6 +158,7 @@ public class ValidationEngine implements IValidatorResourceFetcher, IValidationP
   @Getter @Setter private boolean crumbTrails;
   @Getter @Setter private boolean allowExampleUrls;
   @Getter @Setter private boolean showMessagesFromReferences;
+  @Getter @Setter private boolean doImplicitFHIRPathStringConversion;
   @Getter @Setter private Locale locale;
   @Getter @Setter private List<ImplementationGuide> igs = new ArrayList<>();
   @Getter @Setter private List<String> extensionDomains = new ArrayList<>();
@@ -623,6 +624,7 @@ public class ValidationEngine implements IValidatorResourceFetcher, IValidationP
     validator.setQuestionnaireMode(questionnaireMode);
     validator.setLevel(level);
     validator.setNoUnicodeBiDiControlChars(noUnicodeBiDiControlChars);
+    validator.setDoImplicitFHIRPathStringConversion(doImplicitFHIRPathStringConversion);
     if (format == FhirFormat.SHC) {
       igLoader.loadIg(getIgs(), getBinaries(), SHCParser.CURRENT_PACKAGE, true);      
     }
diff --git a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/model/CliContext.java b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/model/CliContext.java
index 45c40033d..49630d9bd 100644
--- a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/model/CliContext.java
+++ b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/model/CliContext.java
@@ -46,6 +46,8 @@ public class CliContext {
   private boolean noInvariants = false;
   @JsonProperty("wantInvariantsInMessages")
   private boolean wantInvariantsInMessages = false;
+  @JsonProperty("doImplicitFHIRPathStringConversion")
+  private boolean doImplicitFHIRPathStringConversion = false;
 
   @JsonProperty("map")
   private String map = null;
@@ -233,6 +235,16 @@ public class CliContext {
     return this;
   }
 
+  @JsonProperty("doImplicitFHIRPathStringConversion")
+  public boolean isDoImplicitFHIRPathStringConversion() {
+    return doImplicitFHIRPathStringConversion;
+  }
+
+  @JsonProperty("doImplicitFHIRPathStringConversion")
+  public void setDoImplicitFHIRPathStringConversion(boolean doImplicitFHIRPathStringConversion) {
+    this.doImplicitFHIRPathStringConversion = doImplicitFHIRPathStringConversion;
+  }
+
   @JsonProperty("locale")
   public String getLanguageCode() {
     return locale;
diff --git a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/services/StandAloneValidatorFetcher.java b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/services/StandAloneValidatorFetcher.java
index 5e6510933..7e6e6d4fe 100644
--- a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/services/StandAloneValidatorFetcher.java
+++ b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/services/StandAloneValidatorFetcher.java
@@ -21,7 +21,7 @@ import org.hl7.fhir.r5.utils.validation.constants.ReferenceValidationPolicy;
 import org.hl7.fhir.utilities.Utilities;
 import org.hl7.fhir.utilities.VersionUtilities;
 import org.hl7.fhir.utilities.VersionUtilities.VersionURLInfo;
-import org.hl7.fhir.utilities.json.JSONUtil;
+import org.hl7.fhir.utilities.json.JsonUtilities;
 import org.hl7.fhir.utilities.json.JsonTrackingParser;
 import org.hl7.fhir.utilities.npm.FilesystemPackageCacheManager;
 import org.hl7.fhir.utilities.npm.NpmPackage;
@@ -165,8 +165,8 @@ public class StandAloneValidatorFetcher implements IValidatorResourceFetcher, IV
       JsonObject json;
       try {
         json = JsonTrackingParser.fetchJson("http://hl7.org/fhir/mappingspaces.json");
-        for (JsonObject ms : JSONUtil.objects(json, "spaces")) {
-          mappingsUris.add(JSONUtil.str(ms, "url"));
+        for (JsonObject ms : JsonUtilities.objects(json, "spaces")) {
+          mappingsUris.add(JsonUtilities.str(ms, "url"));
         }
       } catch (IOException e) {
         // frozen R4 list
diff --git a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/services/ValidationService.java b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/services/ValidationService.java
index 80c020537..73a60e5ee 100644
--- a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/services/ValidationService.java
+++ b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/services/ValidationService.java
@@ -354,6 +354,7 @@ public class ValidationService {
       validator.setSnomedExtension(cliContext.getSnomedCTCode());
       validator.setAssumeValidRestReferences(cliContext.isAssumeValidRestReferences());
       validator.setShowMessagesFromReferences(cliContext.isShowMessagesFromReferences());
+      validator.setDoImplicitFHIRPathStringConversion(cliContext.isDoImplicitFHIRPathStringConversion());
       validator.setNoExtensibleBindingMessages(cliContext.isNoExtensibleBindingMessages());
       validator.setNoUnicodeBiDiControlChars(cliContext.isNoUnicodeBiDiControlChars());
       validator.setNoInvariantChecks(cliContext.isNoInvariants());
diff --git a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/utils/Params.java b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/utils/Params.java
index 640b22b16..e96a99853 100644
--- a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/utils/Params.java
+++ b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/utils/Params.java
@@ -68,6 +68,7 @@ public class Params {
   public static final String SHOW_TIMES = "-show-times";
   public static final String ALLOW_EXAMPLE_URLS = "-allow-example-urls";
   public static final String OUTPUT_STYLE = "-output-style";
+  public static final String DO_IMPLICIT_FHIRPATH_STRING_CONVERSION = "-implicit-fhirpath-string-conversions";
   private static final Object JURISDICTION = "-jurisdiction";
 
   /**
@@ -167,6 +168,8 @@ public class Params {
         cliContext.setRecursive(true);
       } else if (args[i].equals(SHOW_MESSAGES_FROM_REFERENCES)) {
         cliContext.setShowMessagesFromReferences(true);
+      } else if (args[i].equals(DO_IMPLICIT_FHIRPATH_STRING_CONVERSION)) {
+        cliContext.setDoImplicitFHIRPathStringConversion(true);
       } else if (args[i].equals(LOCALE)) {
         if (i + 1 == args.length) {
           throw new Error("Specified -locale without indicating locale");
diff --git a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/instance/InstanceValidator.java b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/instance/InstanceValidator.java
index f77b61979..63a0d2bb8 100644
--- a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/instance/InstanceValidator.java
+++ b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/instance/InstanceValidator.java
@@ -544,6 +544,14 @@ public class InstanceValidator extends BaseValidator implements IResourceValidat
     this.crumbTrails = crumbTrails;
   }
 
+  public boolean isDoImplicitFHIRPathStringConversion() {
+    return fpe.isDoImplicitStringConversion();
+  }
+
+  public void setDoImplicitFHIRPathStringConversion(boolean doImplicitFHIRPathStringConversion) {
+    fpe.setDoImplicitStringConversion(doImplicitFHIRPathStringConversion);
+  }
+
   private boolean allowUnknownExtension(String url) {
     if ((allowExamples && (url.contains("example.org") || url.contains("acme.com"))) || url.contains("nema.org") || url.startsWith("http://hl7.org/fhir/tools/StructureDefinition/") || url.equals("http://hl7.org/fhir/StructureDefinition/structuredefinition-expression"))
       // Added structuredefinition-expression explicitly because it wasn't defined in the version of the spec it needs to be used with
diff --git a/org.hl7.fhir.validation/src/test/java/org/hl7/fhir/validation/tests/ValidationTests.java b/org.hl7.fhir.validation/src/test/java/org/hl7/fhir/validation/tests/ValidationTests.java
index 434701498..47d568409 100644
--- a/org.hl7.fhir.validation/src/test/java/org/hl7/fhir/validation/tests/ValidationTests.java
+++ b/org.hl7.fhir.validation/src/test/java/org/hl7/fhir/validation/tests/ValidationTests.java
@@ -56,7 +56,7 @@ import org.hl7.fhir.r5.utils.validation.IValidatorResourceFetcher;
 import org.hl7.fhir.r5.utils.validation.constants.ContainedReferenceValidationPolicy;
 import org.hl7.fhir.r5.utils.validation.constants.ReferenceValidationPolicy;
 import org.hl7.fhir.utilities.SimpleHTTPClient.HTTPResult;
-import org.hl7.fhir.utilities.json.JSONUtil;
+import org.hl7.fhir.utilities.json.JsonUtilities;
 import org.hl7.fhir.utilities.npm.NpmPackage;
 import org.hl7.fhir.utilities.validation.ValidationMessage;
 import org.hl7.fhir.utilities.validation.ValidationMessage.IssueSeverity;
@@ -91,7 +91,7 @@ public class ValidationTests implements IEvaluationContext, IValidatorResourceFe
     manifest = (JsonObject) new com.google.gson.JsonParser().parse(contents);
     for (JsonElement e : manifest.getAsJsonArray("test-cases")) {
       JsonObject o = (JsonObject) e;
-      examples.put(JSONUtil.str(o, "name"), o);
+      examples.put(JsonUtilities.str(o, "name"), o);
     }
 
     List<String> names = new ArrayList<String>(examples.size());
@@ -168,7 +168,7 @@ public class ValidationTests implements IEvaluationContext, IValidatorResourceFe
     if (content.has("use-test") && !content.get("use-test").getAsBoolean())
       return;
 
-    byte[] testCaseContent = TestingUtilities.loadTestResource("validator", JSONUtil.str(content, "file")).getBytes(StandardCharsets.UTF_8);
+    byte[] testCaseContent = TestingUtilities.loadTestResource("validator", JsonUtilities.str(content, "file")).getBytes(StandardCharsets.UTF_8);
     // load and process content    
     FhirFormat fmt = determineFormat(content, testCaseContent);
     
@@ -177,7 +177,7 @@ public class ValidationTests implements IEvaluationContext, IValidatorResourceFe
     val.getContext().setClientRetryCount(4);
     val.setDebug(false);
     
-    if (content.has("fetcher") && "standalone".equals(JSONUtil.str(content, "fetcher"))) {
+    if (content.has("fetcher") && "standalone".equals(JsonUtilities.str(content, "fetcher"))) {
       val.setFetcher(vCurr);
       vCurr.setFetcher(new StandAloneValidatorFetcher(vCurr.getPcm(), vCurr.getContext(), vCurr));
     } else {
@@ -337,8 +337,8 @@ public class ValidationTests implements IEvaluationContext, IValidatorResourceFe
 
 
   private FhirFormat determineFormat(JsonObject config, byte[] cnt) throws IOException {
-    String name = JSONUtil.str(config, "file");
-    return org.hl7.fhir.validation.ResourceChecker.checkIsResource(vCurr.getContext(), true, cnt, name, !JSONUtil.bool(config, "guess-format")); 
+    String name = JsonUtilities.str(config, "file");
+    return org.hl7.fhir.validation.ResourceChecker.checkIsResource(vCurr.getContext(), true, cnt, name, !JsonUtilities.bool(config, "guess-format")); 
   }
 
   private List<StructureDefinition> asSdList(StructureDefinition sd) {
diff --git a/org.hl7.fhir.validation/src/test/resources/txCache/4.5.0/snomed.cache b/org.hl7.fhir.validation/src/test/resources/txCache/4.5.0/snomed.cache
index fa1642254..62e83f63b 100644
--- a/org.hl7.fhir.validation/src/test/resources/txCache/4.5.0/snomed.cache
+++ b/org.hl7.fhir.validation/src/test/resources/txCache/4.5.0/snomed.cache
@@ -203,3 +203,17 @@ v: {
   "system" : "http://snomed.info/sct"
 }
 -------------------------------------------------------------------------------------
+{"code" : {
+  "system" : "http://snomed.info/sct",
+  "version" : "http://snomed.info/sct/11000172109/version/20210915",
+  "code" : "132037003",
+  "display" : "Pineywoods pig breed. Not."
+}, "valueSet" :null, "lang":"null", "useServer":"true", "useClient":"true", "guessSystem":"false", "valueSetMode":"ALL_CHECKS", "versionFlexible":"false"}####
+v: {
+  "display" : "Pineywoods pig",
+  "code" : "132037003",
+  "system" : "http://snomed.info/sct",
+  "severity" : "warning",
+  "error" : "The display \"Pineywoods pig breed. Not.\" is not a valid display for the code {http://snomed.info/sct}132037003 - should be one of ['Pineywoods pig', 'Pineywoods pig breed (organism)', 'Pineywoods pig breed'] (from http://tx.fhir.org/r4)"
+}
+-------------------------------------------------------------------------------------
diff --git a/pom.xml b/pom.xml
index b167c900d..337d3e439 100644
--- a/pom.xml
+++ b/pom.xml
@@ -19,7 +19,7 @@
 
     <properties>
         <hapi_fhir_version>5.4.0</hapi_fhir_version>
-        <validator_test_case_version>1.1.100</validator_test_case_version>
+        <validator_test_case_version>1.1.101-SNAPSHOT</validator_test_case_version>
         <junit_jupiter_version>5.7.1</junit_jupiter_version>
         <junit_platform_launcher_version>1.7.1</junit_platform_launcher_version>
         <maven_surefire_version>3.0.0-M5</maven_surefire_version>