diff --git a/src/main/java/gov/cms/madie/cql_elm_translator/dto/CqlBuilderLookup.java b/src/main/java/gov/cms/madie/cql_elm_translator/dto/CqlBuilderLookup.java
index 59985c4..b30b82e 100644
--- a/src/main/java/gov/cms/madie/cql_elm_translator/dto/CqlBuilderLookup.java
+++ b/src/main/java/gov/cms/madie/cql_elm_translator/dto/CqlBuilderLookup.java
@@ -5,6 +5,8 @@
 
 import java.util.Set;
 
+import org.apache.commons.lang3.StringUtils;
+
 @Data
 @Builder
 public class CqlBuilderLookup {
@@ -21,5 +23,20 @@ public static class Lookup {
     private String libraryAlias;
     private String logic;
     private int startLine;
+
+    @Override
+    public boolean equals(Object o) {
+      if (o == this) {
+        return true;
+      }
+      CqlBuilderLookup.Lookup lookup = (CqlBuilderLookup.Lookup) o;
+
+      if (StringUtils.equals(lookup.getName(), this.getName())
+          && StringUtils.equals(lookup.getLibraryAlias(), this.getLibraryAlias())
+          && lookup.getLibraryName().equals(this.getLibraryName())) {
+        return true;
+      }
+      return false;
+    }
   }
 }
diff --git a/src/main/java/gov/cms/madie/cql_elm_translator/dto/CqlBuilderLookupComparator.java b/src/main/java/gov/cms/madie/cql_elm_translator/dto/CqlBuilderLookupComparator.java
new file mode 100644
index 0000000..3350987
--- /dev/null
+++ b/src/main/java/gov/cms/madie/cql_elm_translator/dto/CqlBuilderLookupComparator.java
@@ -0,0 +1,32 @@
+package gov.cms.madie.cql_elm_translator.dto;
+
+import java.util.Comparator;
+
+import org.apache.commons.lang3.StringUtils;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class CqlBuilderLookupComparator<T> implements Comparator<CqlBuilderLookup.Lookup> {
+
+  /***
+   * This is required because the name/line numbers can conflict between line
+   * numbers
+   */
+  public int compare(CqlBuilderLookup.Lookup lookup1, CqlBuilderLookup.Lookup lookup2) {
+
+    int result;
+
+    if (StringUtils.equalsIgnoreCase(lookup1.getName(), lookup2.getName())
+        && StringUtils.equalsIgnoreCase(lookup1.getLibraryAlias(), lookup2.getLibraryAlias())) {
+      result = 0;
+    } else if (lookup1.getStartLine() == lookup2.getStartLine()) {
+      // if the names are different but the lines are the same
+      result = lookup1.getStartLine() - lookup2.getStartLine() + 1;
+    } else {
+      result = lookup1.getStartLine() - lookup2.getStartLine();
+    }
+
+    return result;
+  }
+}