diff --git a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/AA.groovy b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/AA.groovy
index 25a5402..177df9b 100644
--- a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/AA.groovy
+++ b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/AA.groovy
@@ -7,7 +7,7 @@ import javax.xml.bind.annotation.XmlElement
 
 @ToString
 @EqualsAndHashCode
-class AA {
+class AA implements GeiaEntity {
 
     @XmlElement(name = "end_item_acronym_code")
     String endItemAcronymCode
diff --git a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/AB.groovy b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/AB.groovy
index 931e89d..9c3c436 100644
--- a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/AB.groovy
+++ b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/AB.groovy
@@ -7,7 +7,7 @@ import javax.xml.bind.annotation.XmlElement
 
 @ToString
 @EqualsAndHashCode
-class AB {
+class AB implements GeiaEntity {
 
     @XmlElement(name = "end_item_acronym_code")
     String endItemAcronymCode
diff --git a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/AG.groovy b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/AG.groovy
index bfa7c24..759757f 100644
--- a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/AG.groovy
+++ b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/AG.groovy
@@ -7,7 +7,7 @@ import javax.xml.bind.annotation.XmlElement
 
 @ToString
 @EqualsAndHashCode
-class AG {
+class AG implements GeiaEntity {
 
     @XmlElement(name = "end_item_acronym_code")
     String endItemAcronymCode
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 4908fb5..6ddf92c 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
@@ -7,7 +7,7 @@ import javax.xml.bind.annotation.XmlElement
 
 @ToString
 @EqualsAndHashCode
-class CA {
+class CA implements GeiaEntity {
 
     @XmlElement(name = "end_item_acronym_code")
     String endItemAcronymCode
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 eb06c8e..7d02eed 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
@@ -7,7 +7,7 @@ import javax.xml.bind.annotation.XmlElement
 
 @ToString
 @EqualsAndHashCode
-class CI {
+class CI implements GeiaEntity {
 
     @XmlElement(name = "end_item_acronym_code")
     String endItemAcronymCode
diff --git a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/GA.groovy b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/GA.groovy
index 5721eca..f41d7f8 100644
--- a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/GA.groovy
+++ b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/GA.groovy
@@ -7,7 +7,7 @@ import javax.xml.bind.annotation.XmlElement
 
 @ToString
 @EqualsAndHashCode
-class GA {
+class GA implements GeiaEntity {
 
     @XmlElement(name = "skill_specialty_code")
     String skillSpecialityCode
diff --git a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XMLModel.groovy b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/GeiaStdModel.groovy
similarity index 98%
rename from src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XMLModel.groovy
rename to src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/GeiaStdModel.groovy
index 1bafd22..89c0144 100644
--- a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XMLModel.groovy
+++ b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/GeiaStdModel.groovy
@@ -15,7 +15,7 @@ import javax.xml.bind.annotation.XmlRootElement
 @EqualsAndHashCode
 @XmlAccessorType(XmlAccessType.FIELD)
 @XmlRootElement(name = "GEIA-STD-0007")
-class XMLModel {
+class GeiaStdModel {
 
     @XmlElementWrapper(name = "full_file")
     @XmlElements([
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 486a046..b0e8377 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
@@ -7,7 +7,7 @@ import javax.xml.bind.annotation.XmlElement
 
 @ToString
 @EqualsAndHashCode
-class HA {
+class HA implements GeiaEntity {
 
     @XmlElement(name = "commercial_and_government_entity_code")
     String cageCode
diff --git a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XA.groovy b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XA.groovy
index f02be30..d37984f 100644
--- a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XA.groovy
+++ b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XA.groovy
@@ -15,4 +15,6 @@ class XA implements GeiaEntity {
     @XmlElement(name = "logistics_support_analysis_control_number_structure")
     String lcnStructure
 
+    transient List<XB> xbChildren = new ArrayList<>()
+
 }
diff --git a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XB.groovy b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XB.groovy
index 68a9d61..0942404 100644
--- a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XB.groovy
+++ b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XB.groovy
@@ -7,7 +7,7 @@ import javax.xml.bind.annotation.XmlElement
 
 @ToString
 @EqualsAndHashCode
-class XB {
+class XB implements GeiaEntity {
 
     @XmlElement(name = "end_item_acronym_code")
     String endItemAcronymCode
@@ -30,4 +30,8 @@ class XB {
     @XmlElement(name = "system_end_item_identifier")
     String systemEndItemIdentifier
 
+    transient List<XB> xbChildren = new ArrayList<>()
+
+    transient List<CA> caChildren = new ArrayList<>()
+
 }
diff --git a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XH.groovy b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XH.groovy
index a5841e6..386595c 100644
--- a/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XH.groovy
+++ b/src/main/groovy/com/lmco/spectrum/systemnavigation3d/domain/dto/XH.groovy
@@ -7,7 +7,7 @@ import javax.xml.bind.annotation.XmlElement
 
 @ToString
 @EqualsAndHashCode
-class XH {
+class XH implements GeiaEntity {
 
     @XmlElement(name = "commercial_and_government_entity_code")
     String cageCode
diff --git a/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/GeiaDataSource.java b/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/GeiaDataSource.java
new file mode 100644
index 0000000..03a89c5
--- /dev/null
+++ b/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/GeiaDataSource.java
@@ -0,0 +1,16 @@
+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 java.util.List;
+
+public interface GeiaDataSource {
+
+    List<XA> getXAs();
+    XA getXA(String endItemAcronymCode);
+    XB getXB(XA src, String lcn);
+    CA getCA(XB src, String taskCode);
+
+}
diff --git a/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/XMLGeiaDataSource.java b/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/XMLGeiaDataSource.java
new file mode 100644
index 0000000..1fffefa
--- /dev/null
+++ b/src/main/java/com/lmco/spectrum/systemnavigation3d/geia/XMLGeiaDataSource.java
@@ -0,0 +1,100 @@
+package com.lmco.spectrum.systemnavigation3d.geia;
+
+import com.lmco.spectrum.systemnavigation3d.domain.dto.*;
+
+import javax.xml.bind.JAXBContext;
+import javax.xml.bind.JAXBException;
+import javax.xml.bind.Unmarshaller;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class XMLGeiaDataSource implements GeiaDataSource {
+
+    private GeiaStdModel stdModel;
+    private Map<Class<? extends GeiaEntity>, List<GeiaEntity>> geiaEntityMap;
+
+    private List<XA> xaList;
+
+    public XMLGeiaDataSource(InputStream xmlStream) {
+        this.xaList = new ArrayList<>();
+        this.geiaEntityMap = new HashMap<>();
+
+        try {
+            JAXBContext jaxbContext = JAXBContext.newInstance(GeiaStdModel.class);
+            Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
+
+            stdModel = (GeiaStdModel) unmarshaller.unmarshal(xmlStream);
+            this.processGeiaStd();
+        } catch (JAXBException e) {
+            e.printStackTrace();
+        }
+
+    }
+
+    private void processGeiaStd() {
+
+        for(GeiaEntity entity : stdModel.getGeiaFullFile()) {
+            if(!geiaEntityMap.containsKey(entity.getClass())) {
+                geiaEntityMap.put(entity.getClass(), new ArrayList<>());
+            }
+            geiaEntityMap.get(entity.getClass()).add(entity);
+        }
+
+        geiaEntityMap.get(XA.class).forEach(xa -> xaList.add((XA) xa));
+
+        for(XA xa : xaList) {
+            pairXAWithChildren(xa);
+        }
+
+    }
+
+    private void pairXAWithChildren(XA src) {
+        geiaEntityMap.get(XB.class)
+                .stream()
+                .map(entity -> (XB)entity)
+                .filter(xb -> xb.getLcnIndentureCode().charAt(0) == 'A' && src.getEndItemAcronymCode().equals(xb.getEndItemAcronymCode()))
+                .forEach(xb -> {
+                    pairXBWithChildren(xb);
+                    src.getXbChildren().add(xb);
+                });
+    }
+
+    private void pairXBWithChildren(XB src) {
+        geiaEntityMap.get(XB.class)
+                .stream()
+                .map(entity -> (XB)entity)
+                .filter(xb -> xb.getLcn().startsWith(src.getLcn()) && xb.getLcnIndentureCode().charAt(0)-1 == src.getLcnIndentureCode().charAt(0))
+                .forEach(xb -> {
+                    pairXBWithChildren(xb);
+                    src.getXbChildren().add(xb);
+                });
+        geiaEntityMap.get(CA.class)
+                .stream()
+                .map(entity -> (CA)entity)
+                .filter(ca -> src.getLcn().equals(ca.getLcn()))
+                .forEach(ca -> src.getCaChildren().add(ca)); // TODO process CA children
+    }
+
+    @Override
+    public List<XA> getXAs() {
+        return xaList;
+    }
+
+    @Override
+    public XA getXA(String endItemAcronymCode) {
+        return xaList.stream().filter(xa -> xa.getEndItemAcronymCode().equals(endItemAcronymCode)).findFirst().orElse(null);
+    }
+
+    @Override
+    public XB getXB(XA src, String lcn) {
+        return src.getXbChildren().stream().filter(xb -> xb.getLcn().equals(lcn)).findFirst().orElse(null);
+    }
+
+    @Override
+    public CA getCA(XB src, String taskCode) {
+        return src.getCaChildren().stream().filter(ca -> ca.getTaskCode().equals(taskCode)).findFirst().orElse(null);
+    }
+}
diff --git a/src/main/java/com/lmco/spectrum/systemnavigation3d/service/GeiaService.java b/src/main/java/com/lmco/spectrum/systemnavigation3d/service/GeiaService.java
index 3b189c8..f477361 100644
--- a/src/main/java/com/lmco/spectrum/systemnavigation3d/service/GeiaService.java
+++ b/src/main/java/com/lmco/spectrum/systemnavigation3d/service/GeiaService.java
@@ -1,33 +1,23 @@
 package com.lmco.spectrum.systemnavigation3d.service;
 
-import com.lmco.spectrum.systemnavigation3d.domain.dto.XMLModel;
+import com.lmco.spectrum.systemnavigation3d.geia.GeiaDataSource;
+import com.lmco.spectrum.systemnavigation3d.geia.XMLGeiaDataSource;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
-import javax.xml.bind.JAXBContext;
-import javax.xml.bind.JAXBException;
-import javax.xml.bind.Unmarshaller;
-import java.io.File;
-
 @Service
 public class GeiaService {
 
     @Autowired
     ResourceService resourceService;
 
-    public void test() {
-
-        try {
-            JAXBContext jaxbContext = JAXBContext.newInstance(XMLModel.class);
-            Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
-
-            XMLModel temp = (XMLModel) unmarshaller.unmarshal(new File("D:\\Development\\SDP\\files\\test1 (1).xml"));
+    private GeiaDataSource geiaDataSource;
 
-
-        } catch (JAXBException e) {
-            e.printStackTrace();
+    public GeiaDataSource getGeiaDataSource() {
+        if(this.geiaDataSource == null) {
+            this.geiaDataSource = new XMLGeiaDataSource(resourceService.getFileAsStream("geia/test1.xml"));
         }
-
+        return geiaDataSource;
     }
 
 }
diff --git a/src/test/java/com/lmco/spectrum/systemnavigation3d/Systemnavigation3dApplicationTests.java b/src/test/java/com/lmco/spectrum/systemnavigation3d/Systemnavigation3dApplicationTests.java
index 4d5b2ff..1f08089 100644
--- a/src/test/java/com/lmco/spectrum/systemnavigation3d/Systemnavigation3dApplicationTests.java
+++ b/src/test/java/com/lmco/spectrum/systemnavigation3d/Systemnavigation3dApplicationTests.java
@@ -1,5 +1,6 @@
 package com.lmco.spectrum.systemnavigation3d;
 
+import com.lmco.spectrum.systemnavigation3d.geia.GeiaDataSource;
 import com.lmco.spectrum.systemnavigation3d.service.GeiaService;
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
@@ -15,9 +16,7 @@ class Systemnavigation3dApplicationTests {
 
     @Test
     void contextLoads() {
-
-        geiaService.test();
-
+        GeiaDataSource geiaDataSource = geiaService.getGeiaDataSource();
     }
 
 }