diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/renderers/AdditionalBindingsRenderer.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/renderers/AdditionalBindingsRenderer.java
index 92a5651fe..836745fb5 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/renderers/AdditionalBindingsRenderer.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/renderers/AdditionalBindingsRenderer.java
@@ -186,6 +186,18 @@ public class AdditionalBindingsRenderer {
     return abr;
   }
 
+  protected AdditionalBindingDetail additionalBinding(ElementDefinitionBindingAdditionalComponent ab) {
+    AdditionalBindingDetail abr = new AdditionalBindingDetail();
+    abr.purpose =  ab.getPurpose().toCode();
+    abr.valueSet =  ab.getValueSet();
+    abr.doco =  ab.getDocumentation();
+    abr.docoShort =  ab.getShortDoco();
+    abr.usage = ab.hasUsage() ? ab.getUsageFirstRep() : null;
+    abr.any = ab.getAny();
+    abr.isUnchanged = ab.hasUserData(ProfileUtilities.UD_DERIVATION_EQUALS);
+    return abr;
+  }
+
   public String render() throws IOException {
     if (bindings.isEmpty()) {
       return "";
@@ -455,4 +467,40 @@ public class AdditionalBindingsRenderer {
     
   }
 
+  public void seeAdditionalBindings(ElementDefinition definition, ElementDefinition compDef, boolean compare) {
+    HashMap<String, AdditionalBindingDetail> compBindings = new HashMap<String, AdditionalBindingDetail>();
+    if (compare && compDef.getBinding().getAdditional() != null) {
+      for (ElementDefinitionBindingAdditionalComponent ab : compDef.getBinding().getAdditional()) {
+        AdditionalBindingDetail abr = additionalBinding(ab);
+        if (compBindings.containsKey(abr.getKey())) {
+          abr.incrementCount();
+        }
+        compBindings.put(abr.getKey(), abr);
+      }
+    }
+
+    for (ElementDefinitionBindingAdditionalComponent ab : definition.getBinding().getAdditional()) {
+      AdditionalBindingDetail abr = additionalBinding(ab);
+      if (compare && compDef != null) {
+        AdditionalBindingDetail match = null;
+        do {
+          match = compBindings.get(abr.getKey());
+          if (abr.alreadyMatched())
+            abr.incrementCount();
+        } while (match!=null && abr.alreadyMatched());
+        if (match!=null)
+          abr.setCompare(match);
+        bindings.add(abr);
+        if (abr.compare!=null)
+          compBindings.remove(abr.compare.getKey());
+      } else
+        bindings.add(abr);
+    }
+    for (AdditionalBindingDetail b: compBindings.values()) {
+      b.removed = true;
+      bindings.add(b);
+    }
+    
+  }
+
 }
diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/renderers/StructureDefinitionRenderer.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/renderers/StructureDefinitionRenderer.java
index 011161f2c..3be82060c 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/renderers/StructureDefinitionRenderer.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/renderers/StructureDefinitionRenderer.java
@@ -68,6 +68,7 @@ import org.hl7.fhir.r5.model.UriType;
 import org.hl7.fhir.r5.model.ValueSet;
 import org.hl7.fhir.r5.renderers.utils.BaseWrappers.ResourceWrapper;
 import org.hl7.fhir.r5.renderers.StructureDefinitionRenderer.InternalMarkdownProcessor;
+import org.hl7.fhir.r5.renderers.StructureDefinitionRenderer.SourcedElementDefinition;
 import org.hl7.fhir.r5.renderers.utils.RenderingContext;
 import org.hl7.fhir.r5.renderers.utils.RenderingContext.GenerationRules;
 import org.hl7.fhir.r5.renderers.utils.RenderingContext.KnownLinkType;
@@ -157,6 +158,25 @@ public class StructureDefinitionRenderer extends ResourceRenderer {
   //
   //  }
 
+  public class SourcedElementDefinition {
+    private StructureDefinition profile;
+    private ElementDefinition definition;
+    
+    
+    protected SourcedElementDefinition(StructureDefinition profile, ElementDefinition definition) {
+      super();
+      this.profile = profile;
+      this.definition = definition;
+    }
+    public StructureDefinition getProfile() {
+      return profile;
+    }
+    public ElementDefinition getDefinition() {
+      return definition;
+    }
+    
+  }
+
   public class InternalMarkdownProcessor implements IMarkdownProcessor {
 
     @Override
@@ -1320,6 +1340,22 @@ public class StructureDefinitionRenderer extends ResourceRenderer {
             }
           }
         }
+        if (logicalModel) {
+          List<SourcedElementDefinition> ancestors = new ArrayList<>();
+          getAncestorElements(profile, ancestors);
+          if (ancestors.size() > 0) {
+            c.addPiece(gen.new Piece("br"));
+            c.addPiece(gen.new Piece(null, "Elements defined in Ancestors: ", null));
+            boolean first = true;
+            for (SourcedElementDefinition ed : ancestors) {
+              if (first)
+                first = false;
+              else
+                c.addPiece(gen.new Piece(null, ", ", null));
+              c.addPiece(gen.new Piece(ed.getProfile().getWebPath(), (isAttr(ed) ? "@" : "")+ed.getDefinition().getName(), ed.getDefinition().getDefinition()));
+            }     
+          }
+        }
       }
       if (definition.getPath().endsWith("url") && definition.hasFixed()) {
         c.getPieces().add(checkForNoChange(definition.getFixed(), gen.new Piece(null, "\""+buildJson(definition.getFixed())+"\"", null).addStyle("color: darkgreen")));
@@ -1552,6 +1588,7 @@ public class StructureDefinitionRenderer extends ResourceRenderer {
             } 
 
             AdditionalBindingsRenderer abr = new AdditionalBindingsRenderer(context.getPkp(), corePath, profile, definition.getPath(), rc, null, this);
+            abr.seeAdditionalBindings(definition, null, false);
             if (binding.hasExtension(ToolingExtensions.EXT_MAX_VALUESET)) {
               abr.seeMaxBinding(ToolingExtensions.getExtension(binding, ToolingExtensions.EXT_MAX_VALUESET));
             }
@@ -1651,6 +1688,26 @@ public class StructureDefinitionRenderer extends ResourceRenderer {
     return c;
   }
 
+  private boolean isAttr(SourcedElementDefinition ed) {
+    for (Enumeration<PropertyRepresentation> t : ed.getDefinition().getRepresentation()) {
+      if (t.getValue() == PropertyRepresentation.XMLATTR) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  private void getAncestorElements(StructureDefinition profile, List<SourcedElementDefinition> ancestors) {
+    StructureDefinition base = context.getContext().fetchResource(StructureDefinition.class, profile.getBaseDefinition());
+    if (base != null) {
+      getAncestorElements(base, ancestors);
+      for (ElementDefinition ed : base.getDifferential().getElement()) {
+        if (Utilities.charCount(ed.getPath(), '.') == 1) {
+          ancestors.add(new SourcedElementDefinition(base, ed));
+        }
+      }
+    }
+  }
 
   private void addCanonicalListExt(HierarchicalTableGenerator gen, Cell c, List<Extension> list, String start, boolean bold) {
     List<CanonicalType> clist = new ArrayList<>();