diff --git a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/CA.groovy b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/CA.groovy
index 6ddf92c..259ed8e 100644
--- a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/CA.groovy
+++ b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/CA.groovy
@@ -45,4 +45,6 @@ class CA implements GeiaEntity {
     @XmlElement(name = "preventive_maintenance_checks_and_services_indicator_code")
     String preventiveMaintenanceChecksAndServicesIndicatorCode
 
+    transient List<CI> ciChildren = new ArrayList<>()
+
 }
diff --git a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/CI.groovy b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/CI.groovy
index 7d02eed..9d88a43 100644
--- a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/CI.groovy
+++ b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/CI.groovy
@@ -39,4 +39,5 @@ class CI implements GeiaEntity {
     @XmlElement(name = "task_provision_logistics_support_analysis_control_number_type")
     String taskProvisionLcnType
 
+    transient HG hgChild
 }
diff --git a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/HA.groovy b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/HA.groovy
index b0e8377..96b3060 100644
--- a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/HA.groovy
+++ b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/HA.groovy
@@ -18,4 +18,6 @@ class HA implements GeiaEntity {
     @XmlElement(name = "item_name")
     String itemName
 
+    transient XH xhParent;
+
 }
diff --git a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/HG.groovy b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/HG.groovy
index 6c4aed8..375efa5 100644
--- a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/HG.groovy
+++ b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/HG.groovy
@@ -27,4 +27,6 @@ class HG implements GeiaEntity {
     @XmlElement(name = "logistics_support_analysis_control_number_type")
     String lcnType
 
+    transient HA haParent
+
 }
diff --git a/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/GeiaDataSource.java b/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/GeiaDataSource.java
index 03a89c5..8b5e7be 100644
--- a/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/GeiaDataSource.java
+++ b/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/GeiaDataSource.java
@@ -3,6 +3,9 @@ package com.lmco.spectrum.systemnavigation3d.geia;
 import com.lmco.spectrum.systemnavigation3d.domain.dto.CA;
 import com.lmco.spectrum.systemnavigation3d.domain.dto.XA;
 import com.lmco.spectrum.systemnavigation3d.domain.dto.XB;
+import com.lmco.spectrum.systemnavigation3d.domain.dto.XH;
+import com.lmco.spectrum.systemnavigation3d.domain.dto.CI;
+import com.lmco.spectrum.systemnavigation3d.domain.dto.HG;
 
 import java.util.List;
 
@@ -10,7 +13,9 @@ public interface GeiaDataSource {
 
     List<XA> getXAs();
     XA getXA(String endItemAcronymCode);
+    XH getXH(String cageCode);
     XB getXB(XA src, String lcn);
     CA getCA(XB src, String taskCode);
+    CI getCI(CA src, String cageCode, String taskProvisionReferenceNumber);
 
 }
diff --git a/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/XMLGeiaDataSource.java b/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/XMLGeiaDataSource.java
index 7e5d722..2098719 100644
--- a/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/XMLGeiaDataSource.java
+++ b/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/XMLGeiaDataSource.java
@@ -17,9 +17,11 @@ public class XMLGeiaDataSource implements GeiaDataSource {
     private Map<Class<? extends GeiaEntity>, List<GeiaEntity>> geiaEntityMap;
 
     private List<XA> xaList;
+    private List<XH> xhList;
 
     public XMLGeiaDataSource(InputStream xmlStream) {
         this.xaList = new ArrayList<>();
+        this.xhList = new ArrayList<>();
         this.geiaEntityMap = new HashMap<>();
 
         try {
@@ -49,17 +51,18 @@ public class XMLGeiaDataSource implements GeiaDataSource {
         }
 
         xaList.addAll(getEntities(XA.class));
+        xhList.addAll(getEntities(XH.class));
 
         for(XA xa : xaList) {
             pairXAWithChildren(xa);
         }
-
     }
 
     private void pairXAWithChildren(XA src) {
         getEntities(XB.class)
                 .stream()
-                .filter(xb -> xb.getLcnIndentureCode().charAt(0) == 'A' && src.getEndItemAcronymCode().equals(xb.getEndItemAcronymCode()))
+                .filter(xb -> xb.getLcnIndentureCode().charAt(0) == 'A'
+                        && src.getEndItemAcronymCode().equals(xb.getEndItemAcronymCode()))
                 .forEach(xb -> {
                     pairXBWithChildren(xb);
                     src.getXbChildren().add(xb);
@@ -69,15 +72,66 @@ public class XMLGeiaDataSource implements GeiaDataSource {
     private void pairXBWithChildren(XB src) {
         getEntities(XB.class)
                 .stream()
-                .filter(xb -> xb.getLcn().startsWith(src.getLcn()) && xb.getLcnIndentureCode().charAt(0)-1 == src.getLcnIndentureCode().charAt(0))
+                .filter(xb -> xb.getLcn().startsWith(src.getLcn())
+                        && xb.getLcnIndentureCode().charAt(0)-1 == src.getLcnIndentureCode().charAt(0)
+                        && xb.getEndItemAcronymCode().equals(src.getEndItemAcronymCode()))
                 .forEach(xb -> {
                     pairXBWithChildren(xb);
                     src.getXbChildren().add(xb);
                 });
         getEntities(CA.class)
                 .stream()
-                .filter(ca -> src.getLcn().equals(ca.getLcn()))
-                .forEach(ca -> src.getCaChildren().add(ca)); // TODO process CA children
+                .filter(ca -> src.getLcn().equals(ca.getLcn())
+                        && src.getEndItemAcronymCode().equals(ca.getEndItemAcronymCode()))
+                .forEach(ca -> {
+                    pairCAWithChildren(ca);
+                    src.getCaChildren().add(ca);
+                });
+    }
+
+    private void pairCAWithChildren(CA src){
+        getEntities(CI.class)
+                .stream()
+                .filter(ci -> src.getLcn().equals(ci.getLcn())
+                        && src.getEndItemAcronymCode().equals(ci.getEndItemAcronymCode()))
+                .forEach(ci -> {
+                    pairCIWithHGChild(ci);
+                    src.getCiChildren().add(ci);
+                });
+    }
+
+    private void pairCIWithHGChild(CI src){
+        getEntities(HG.class)
+                .stream()
+                .filter(hg -> src.getLcn().equals(hg.getLcn())
+                        && src.getTaskProvisionCageCode().equals(hg.getCageCode())
+                        && src.getTaskProvisionReferenceNumber().equals(hg.getReferenceNumber())
+                        && src.getEndItemAcronymCode().equals(hg.getEndItemAcronymCode()))
+                .findFirst()
+                .ifPresent(hg -> {
+                    pairHGWithHAParent(hg);
+                    src.setHgChild(hg);
+                });
+    }
+
+    private void pairHGWithHAParent(HG src) {
+        getEntities(HA.class)
+                .stream()
+                .filter(ha -> ha.getCageCode().equals(src.getCageCode())
+                        && ha.getReferenceNumber().equals(src.getReferenceNumber()))
+                .findFirst()
+                .ifPresent(ha -> {
+                    pairHAWithXHParent(ha);
+                    src.setHaParent(ha);
+                });
+    }
+
+    private void pairHAWithXHParent(HA src){
+        getEntities(XH.class)
+                .stream()
+                .filter(xh -> xh.getCageCode().equals(src.getCageCode()))
+                .findFirst()
+                .ifPresent(src::setXhParent);
     }
 
     @Override
@@ -90,6 +144,11 @@ public class XMLGeiaDataSource implements GeiaDataSource {
         return xaList.stream().filter(xa -> xa.getEndItemAcronymCode().equals(endItemAcronymCode)).findFirst().orElse(null);
     }
 
+    @Override
+    public XH getXH(String cageCode){
+        return xhList.stream().filter(xh -> xh.getCageCode().equals(cageCode)).findFirst().orElse(null);
+    }
+
     @Override
     public XB getXB(XA src, String lcn) {
         return src.getXbChildren().stream().filter(xb -> xb.getLcn().equals(lcn)).findFirst().orElse(null);
@@ -99,4 +158,13 @@ public class XMLGeiaDataSource implements GeiaDataSource {
     public CA getCA(XB src, String taskCode) {
         return src.getCaChildren().stream().filter(ca -> ca.getTaskCode().equals(taskCode)).findFirst().orElse(null);
     }
+
+    @Override
+    public CI getCI(CA src, String cageCode, String taskProvisionReferenceNumber){
+        return src.getCiChildren()
+                .stream()
+                .filter(ci -> ci.getTaskProvisionCageCode().equals(cageCode)
+                        && ci.getTaskProvisionReferenceNumber().equals(taskProvisionReferenceNumber))
+                .findFirst().orElse(null);
+    }
 }