diff --git a/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/misc/UTGVersionSorter.java b/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/misc/UTGVersionSorter.java
new file mode 100644
index 000000000..8dfa13310
--- /dev/null
+++ b/org.hl7.fhir.convertors/src/main/java/org/hl7/fhir/convertors/misc/UTGVersionSorter.java
@@ -0,0 +1,210 @@
+package org.hl7.fhir.convertors.misc;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.hl7.fhir.convertors.VersionConvertor_10_50;
+import org.hl7.fhir.convertors.VersionConvertor_30_50;
+import org.hl7.fhir.convertors.VersionConvertor_40_50;
+import org.hl7.fhir.r5.model.Base;
+import org.hl7.fhir.exceptions.FHIRException;
+import org.hl7.fhir.r5.formats.JsonParser;
+import org.hl7.fhir.r5.formats.XmlParser;
+import org.hl7.fhir.r5.model.CanonicalResource;
+import org.hl7.fhir.r5.model.CodeSystem;
+import org.hl7.fhir.r5.model.Resource;
+import org.hl7.fhir.r5.model.ValueSet;
+import org.hl7.fhir.r5.utils.ToolingExtensions;
+import org.hl7.fhir.utilities.Utilities;
+import org.hl7.fhir.utilities.npm.FilesystemPackageCacheManager;
+import org.hl7.fhir.utilities.npm.NpmPackage;
+import org.hl7.fhir.utilities.npm.NpmPackage.PackageResourceInformation;
+import org.hl7.fhir.utilities.npm.ToolsVersion;
+
+public class UTGVersionSorter {
+
+  private FilesystemPackageCacheManager pcm;
+
+  public class CanonicalResourceAnalysis {
+
+    private CanonicalResource resource;
+    private CanonicalResource r2;
+    private CanonicalResource r3;
+    private CanonicalResource r4;
+    private String fmm;
+    private boolean normative;
+    private String recommendation;
+
+    public CanonicalResourceAnalysis(CanonicalResource cr) {
+      this.resource = cr;
+    }
+
+    public String summary() {
+//      return "Relevant: "+resource.getUrl()+" [r2: "+r2Ver+"/"+r2Fmm+"]"+" [r3: "+r3Ver+"/"+r3Fmm+"]"+" [r4: "+r4Ver+"/"+r4Fmm+"/"+r4Normative+"] ---> "+recommendation;
+      return resource.getUrl()+" ---> "+recommendation;
+    }
+
+    public void analyse(Map<String, CanonicalResource> r2l, Map<String, CanonicalResource> r3l, Map<String, CanonicalResource> r4l) {
+      r2 = findMatch(r2l);
+      r3 = findMatch(r3l);
+      r4 = findMatch(r4l);
+      
+      fmm = r4 != null ? ToolingExtensions.readStringExtension(r4, ToolingExtensions.EXT_FMM_LEVEL) : null;
+      normative = (r4 != null) && ToolingExtensions.readStringExtension(r4, ToolingExtensions.EXT_NORMATIVE_VERSION) != null;
+      if (normative) {
+        recommendation = "1.0.0";
+      } else if (Utilities.existsInList(fmm,"3", "4", "5")) {
+        recommendation = "0.5.0";        
+      } else {
+        int i = 1;
+        if (r2 != null && r3 != null && !match(r2, r3, r2l, r3l)) {
+          i++;
+        }
+        if (r3 != null && r4 != null && !match(r3, r4, r3l, r4l)) {
+          i++;
+        }
+        recommendation = "0."+i+".0";
+      }
+    }
+
+    private boolean match(CanonicalResource l, CanonicalResource r, Map<String, CanonicalResource> ll, Map<String, CanonicalResource> rl) {
+      if (l instanceof CodeSystem && r instanceof CodeSystem) {
+        return matchCS((CodeSystem) l, (CodeSystem) r);
+      } else if (l instanceof ValueSet && r instanceof ValueSet) {
+        return matchVS((ValueSet) l, (ValueSet) r, ll, rl);
+      } else {
+        return false;
+      }
+    }
+
+    private boolean matchVS(ValueSet l, ValueSet r, Map<String, CanonicalResource> ll, Map<String, CanonicalResource> rl) {
+      if (l.getCompose().getInclude().size() == 1 && l.getCompose().getExclude().isEmpty() && l.getCompose().getIncludeFirstRep().hasSystem() && !l.getCompose().getIncludeFirstRep().hasConcept() && !l.getCompose().getIncludeFirstRep().hasFilter() && 
+          r.getCompose().getInclude().size() == 1 && r.getCompose().getExclude().isEmpty() && r.getCompose().getIncludeFirstRep().hasSystem() && !r.getCompose().getIncludeFirstRep().hasConcept() && !r.getCompose().getIncludeFirstRep().hasFilter()) {
+        CodeSystem lc = (CodeSystem) ll.get(l.getCompose().getIncludeFirstRep().getSystem());
+        CodeSystem rc = (CodeSystem) rl.get(l.getCompose().getIncludeFirstRep().getSystem());
+        if (lc != null && rc != null) {
+          return matchCS(lc, rc);
+        }
+      }
+      return false;
+    }
+
+    private boolean matchCS(CodeSystem l, CodeSystem r) {
+      return Base.compareDeep(l.getConcept(), r.getConcept(), false);
+    }
+
+    public CanonicalResource findMatch(Map<String, CanonicalResource> r2) {
+      CanonicalResource r = r2.get(resource.getUrl());
+      if (r == null) {
+        r = r2.get(resource.getUrl().replaceAll("http://terminology.hl7.org/", "http://hl7.org/fhir/"));        
+      }
+      if (r == null) {
+        r = r2.get(resource.getUrl().replaceAll("http://terminology.hl7.org/CodeSystem", "http://hl7.org/fhir/"));        
+      }
+      return r;
+    }
+
+  }
+
+  public static void main(String[] args) throws FileNotFoundException, FHIRException, IOException, ParseException, URISyntaxException {
+    new UTGVersionSorter().execute("C:\\work\\org.hl7.fhir.igs\\UTG\\input\\sourceOfTruth");
+  }
+
+  private void execute(String source) throws IOException {
+    List<CanonicalResourceAnalysis> list = new ArrayList<>();
+    System.out.println("Loading UTG");
+    loadFromSource(list, new File(source));
+    
+    Map<String, CanonicalResource> r2 = loadPackageR2("hl7.fhir.r2.core");
+    Map<String, CanonicalResource> r3 = loadPackageR3("hl7.fhir.r3.core");
+    Map<String, CanonicalResource> r4 = loadPackageR4("hl7.fhir.r4.core");
+    
+    System.out.println("Processing");
+    for (CanonicalResourceAnalysis cr : list) {
+      cr.analyse(r2,r3,r4);
+    }
+    
+    System.out.println("Summary");
+    for (CanonicalResourceAnalysis cr : list) {
+      System.out.println(cr.summary());
+    }
+    System.out.println();
+    System.out.println("Done");
+  }
+
+  private Map<String, CanonicalResource> loadPackageR2(String id) throws IOException {
+    Map<String, CanonicalResource>res = new HashMap<>();
+    if (pcm == null) {
+      pcm = new FilesystemPackageCacheManager(true, ToolsVersion.TOOLS_VERSION);
+    }
+    System.out.println("Load "+id);
+    NpmPackage npm = pcm.loadPackage(id);
+    for (PackageResourceInformation p : npm.listIndexedResources("CodeSystem", "ValueSet")) {
+      CanonicalResource r = (CanonicalResource) VersionConvertor_10_50.convertResource(new org.hl7.fhir.dstu2.formats.JsonParser().parse(npm.load(p)));
+      res.put(r.getUrl(), r);
+    }
+    return res;
+  }
+
+  private Map<String, CanonicalResource> loadPackageR3(String id) throws IOException {
+    Map<String, CanonicalResource>res = new HashMap<>();
+    if (pcm == null) {
+      pcm = new FilesystemPackageCacheManager(true, ToolsVersion.TOOLS_VERSION);
+    }
+    System.out.println("Load "+id);
+    NpmPackage npm = pcm.loadPackage(id);
+    for (PackageResourceInformation p : npm.listIndexedResources("CodeSystem", "ValueSet")) {
+      CanonicalResource r = (CanonicalResource) VersionConvertor_30_50.convertResource(new org.hl7.fhir.dstu3.formats.JsonParser().parse(npm.load(p)), false);
+      res.put(r.getUrl(), r);
+    }
+    return res;
+  }
+
+  private Map<String, CanonicalResource> loadPackageR4(String id) throws IOException {
+    Map<String, CanonicalResource>res = new HashMap<>();
+    if (pcm == null) {
+      pcm = new FilesystemPackageCacheManager(true, ToolsVersion.TOOLS_VERSION);
+    }
+    System.out.println("Load "+id);
+    NpmPackage npm = pcm.loadPackage(id);
+    for (PackageResourceInformation p : npm.listIndexedResources("CodeSystem", "ValueSet")) {
+      CanonicalResource r = (CanonicalResource) VersionConvertor_40_50.convertResource(new org.hl7.fhir.r4.formats.JsonParser().parse(npm.load(p)));
+      res.put(r.getUrl(), r);
+    }
+    return res;
+  }
+
+
+  private void loadFromSource(List<CanonicalResourceAnalysis> list, File source) {
+    for (File f : source.listFiles()) {
+      if (f.isDirectory()) {
+        loadFromSource(list, f);
+      } else if (f.getName().endsWith(".xml")) {
+        try {
+          Resource r = new XmlParser().parse(new FileInputStream(f));
+          if (r instanceof CanonicalResource) {
+            CanonicalResource cr = (CanonicalResource) r;
+            cr.setUserData("path", f.getAbsolutePath());
+            if (cr.hasVersion() && cr.getVersion().startsWith("4.")) {
+              list.add(new CanonicalResourceAnalysis(cr));
+            }
+          }
+        } catch (Exception e) {
+          System.out.println(f.getAbsolutePath()+" not a resource? "+e.getMessage());
+        }
+      }
+    }
+    
+  }
+  
+  
+  
+}
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 5f1415f62..414cb0784 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
@@ -35,6 +35,7 @@ import java.io.BufferedOutputStream;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
+import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
@@ -1095,6 +1096,10 @@ public class NpmPackage {
   public boolean isNotForPublication() {
     return JSONUtil.bool(npm, "notForPublication");
  }
+
+  public InputStream load(PackageResourceInformation p) throws FileNotFoundException {
+    return new FileInputStream(p.filename);
+  }
   
   
 }
\ No newline at end of file