diff --git a/src/Utilities/ImportUtils.php b/src/Utilities/ImportUtils.php
index 4ea47790..fb99d63c 100644
--- a/src/Utilities/ImportUtils.php
+++ b/src/Utilities/ImportUtils.php
@@ -187,9 +187,11 @@ public static function buildVersionTypeImports(Version $version, Type $type): vo
                 $imports->addVersionCoreFileImportsByName($type->getVersion(), PHPFHIR_VERSION_CLASSNAME_VERSION_TYPE_MAP);
                 $imports->addVersionCoreFileImportsByName($type->getVersion(), PHPFHIR_VERSION_CLASSNAME_VERSION);
             } else {
-                $valProp = $propertyType->isValueContainer()
-                    ? $propertyType->getProperties()->getProperty(PHPFHIR_VALUE_PROPERTY_NAME)
-                    : $propertyType->getParentProperty(PHPFHIR_VALUE_PROPERTY_NAME);
+                $valProp = match(true) {
+                    $propertyType->isPrimitiveContainer() || $propertyType->isValueContainer() => $propertyType->getProperties()->getProperty(PHPFHIR_VALUE_PROPERTY_NAME),
+                    $propertyType->hasPrimitiveContainerParent() || $propertyType->hasValueContainerParent() => $propertyType->getParentProperty(PHPFHIR_VALUE_PROPERTY_NAME),
+                    default => null,
+                };
 
                 if (null !== $valProp) {
                     $valType = $valProp->getValueFHIRType();
diff --git a/src/Utilities/TypeHintUtils.php b/src/Utilities/TypeHintUtils.php
index ef1a1da4..7ea4a782 100644
--- a/src/Utilities/TypeHintUtils.php
+++ b/src/Utilities/TypeHintUtils.php
@@ -126,8 +126,12 @@ public static function buildBaseHintParts(Version $version, Type $type, bool $fu
 
         if ($type->isPrimitiveOrListType() || $type->hasPrimitiveOrListParent()) {
             $hintTypes = $type->getPrimitiveType()->getPHPReceiveValueTypeHints();
-        } else if ($type->isValueContainer() || $type->hasValueContainerParent()) {
-            $valProp = $type->getProperties()->getProperty(PHPFHIR_VALUE_PROPERTY_NAME) ?? $type->getParentProperty(PHPFHIR_VALUE_PROPERTY_NAME);
+        } else if ($type->isValueContainer() || $type->hasValueContainerParent() || $type->isPrimitiveContainer() || $type->hasPrimitiveContainerParent()) {
+            $valProp = match (true) {
+                $type->isValueContainer() || $type->isPrimitiveContainer() => $type->getProperties()->getProperty(PHPFHIR_VALUE_PROPERTY_NAME),
+                $type->hasValueContainerParent() || $type->hasPrimitiveContainerParent() => $type->getParentProperty(PHPFHIR_VALUE_PROPERTY_NAME),
+                default => null,
+            };
             $ptp = $valProp->getValueFHIRType();
             $hintTypes = [];
             if ($ptp->isPrimitiveOrListType() || $ptp->hasPrimitiveOrListParent()) {
@@ -264,8 +268,7 @@ public static function buildSetterParameterDocHint(Version  $version,
 
         $hintTypes = self::buildBaseHintParts($version, $pt, true);
 
-
-        if ($pt->isValueContainer() || $pt->hasValueContainerParent()) {
+        if ($pt->isValueContainer() || $pt->hasValueContainerParent() || $pt->isPrimitiveContainer() || $pt->hasPrimitiveContainerParent()) {
             $vp = $pt->getProperties()->getProperty(PHPFHIR_VALUE_PROPERTY_NAME) ?? $pt->getParentProperty(PHPFHIR_VALUE_PROPERTY_NAME);
             array_push(
                 $hintTypes,
@@ -311,7 +314,7 @@ public static function buildSetterParameterHint(Version  $version,
         } else {
             $hintTypes = self::buildBaseHintParts($version, $pt, false);
 
-            if ($pt->isValueContainer() || $pt->hasValueContainerParent()) {
+            if ($pt->isValueContainer() || $pt->hasValueContainerParent() || $pt->isPrimitiveContainer() || $pt->hasPrimitiveContainerParent()) {
                 $vp = $pt->getProperties()->getProperty(PHPFHIR_VALUE_PROPERTY_NAME) ?? $pt->getParentProperty(PHPFHIR_VALUE_PROPERTY_NAME);
                 array_push(
                     $hintTypes,
diff --git a/src/Utils/XMLValueLocationUtils.php b/src/Utilities/XMLValueLocationUtils.php
similarity index 83%
rename from src/Utils/XMLValueLocationUtils.php
rename to src/Utilities/XMLValueLocationUtils.php
index 4dbecb55..9a198a25 100644
--- a/src/Utils/XMLValueLocationUtils.php
+++ b/src/Utilities/XMLValueLocationUtils.php
@@ -1,6 +1,6 @@
 <?php declare(strict_types=1);
 
-namespace DCarbone\PHPFHIR\Utils;
+namespace DCarbone\PHPFHIR\Utilities;
 
 /*
  * Copyright 2025 Daniel Carbone (daniel.p.carbone@gmail.com)
@@ -33,13 +33,12 @@ public static function determineDefaultLocation(Type $type, Property $property,
             };
         } else if ($property->isValueProperty()) {
             $case = match (true) {
-                $type->isQuantity() || $type->hasQuantityParent() => 'CONTAINER_ATTRIBUTE',
-                $type->isValueContainer() || $type->hasValueContainerParent() => 'CONTAINER_ATTRIBUTE',
+                $type->isPrimitiveContainer() || $type->hasPrimitiveContainerParent() => 'CONTAINER_ATTRIBUTE',
                 default => 'ELEMENT_ATTRIBUTE'
             };
         } else {
             $case = match (true) {
-                $propType->isValueContainer() || $propType->hasValueContainerParent() => 'CONTAINER_ATTRIBUTE',
+                $propType->isPrimitiveContainer() || $propType->hasPrimitiveContainerParent() => 'CONTAINER_ATTRIBUTE',
                 default => 'ELEMENT_ATTRIBUTE',
             };
         }
diff --git a/src/Version/Definition/Property.php b/src/Version/Definition/Property.php
index 8a914d9c..b946ce4a 100644
--- a/src/Version/Definition/Property.php
+++ b/src/Version/Definition/Property.php
@@ -512,8 +512,8 @@ public function isSerializableAsXMLAttribute(): bool
         }
         return $propType->hasPrimitiveOrListParent()
             || $propType->isPrimitiveOrListType()
-            || $propType->hasValueContainerParent()
-            || $propType->isValueContainer();
+            || $propType->hasPrimitiveContainerParent()
+            || $propType->isPrimitiveContainer();
     }
 
     /**
diff --git a/src/Version/Definition/TypeDecorator.php b/src/Version/Definition/TypeDecorator.php
index 2b6b1445..1e2660d8 100644
--- a/src/Version/Definition/TypeDecorator.php
+++ b/src/Version/Definition/TypeDecorator.php
@@ -371,8 +371,7 @@ public static function setContainedTypeFlag(Config $config, Version $version, Ty
     }
 
     /**
-     * Once parsing has been completed, we must do a final pass to identify types that are primitive containers by
-     * another name.
+     * Primitive containers are Element types that contain a "value" element that is, itself, a primitive.
      *
      * @param \DCarbone\PHPFHIR\Version $version
      * @param \DCarbone\PHPFHIR\Version\Definition\Types $types
diff --git a/template/core/types/interface_primitive_container_type.php b/template/core/types/interface_primitive_container_type.php
index a43d1e26..723f4d4a 100644
--- a/template/core/types/interface_primitive_container_type.php
+++ b/template/core/types/interface_primitive_container_type.php
@@ -23,7 +23,7 @@
 
 $coreFiles = $config->getCoreFiles();
 
-$elementInterface = $coreFiles->getCoreFileByEntityName(PHPFHIR_TYPES_INTERFACE_ELEMENT_TYPE);
+$valueContainerInterface = $coreFiles->getCoreFileByEntityName(PHPFHIR_TYPES_INTERFACE_VALUE_CONTAINER_TYPE);
 $serializeConfigClass = $coreFiles->getCoreFileByEntityName(PHPFHIR_ENCODING_CLASSNAME_SERIALIZE_CONFIG);
 $xmlWriterClass = $coreFiles->getCoreFileByEntityName(PHPFHIR_ENCODING_CLASSNAME_XML_WRITER);
 $xmlValueLocationEnum = $coreFiles->getCoreFileByEntityName(PHPFHIR_ENCODING_ENUM_VALUE_XML_LOCATION);
@@ -31,7 +31,7 @@
 $imports = $coreFile->getimports();
 
 $imports->addCoreFileImports(
-    $elementInterface,
+    $valueContainerInterface,
     $serializeConfigClass,
     $xmlWriterClass,
     $xmlValueLocationEnum,
@@ -46,16 +46,9 @@
 
 <?php echo ImportUtils::compileImportStatements($imports); ?>
 
-interface <?php echo $coreFile->getEntityName(); ?> extends <?php echo $elementInterface->getEntityName(); ?>
+interface <?php echo $coreFile->getEntityName(); ?> extends <?php echo $valueContainerInterface->getEntityName(); ?>
 
 {
-    /**
-     * Must return the appropriate "formatted" stringified version of this type's contained primitive type's value
-     *
-     * @return string
-     */
-    public function _getFormattedValue(): string;
-
     /**
      * Must return true if this primitive container type has a field set other than "value".  This is used during
      * serialization.
diff --git a/template/core/types/interface_value_container_type.php b/template/core/types/interface_value_container_type.php
index 896fa4ff..8c7dc00d 100644
--- a/template/core/types/interface_value_container_type.php
+++ b/template/core/types/interface_value_container_type.php
@@ -23,7 +23,7 @@
 
 $coreFiles = $config->getCoreFiles();
 
-$primitiveContainerInterface = $coreFiles->getCoreFileByEntityName(PHPFHIR_TYPES_INTERFACE_PRIMITIVE_CONTAINER_TYPE);
+$elementInterface = $coreFiles->getCoreFileByEntityName(PHPFHIR_TYPES_INTERFACE_ELEMENT_TYPE);
 $serializeConfigClass = $coreFiles->getCoreFileByEntityName(PHPFHIR_ENCODING_CLASSNAME_SERIALIZE_CONFIG);
 $xmlWriterClass = $coreFiles->getCoreFileByEntityName(PHPFHIR_ENCODING_CLASSNAME_XML_WRITER);
 $xmlValueLocationEnum = $coreFiles->getCoreFileByEntityName(PHPFHIR_ENCODING_ENUM_VALUE_XML_LOCATION);
@@ -31,7 +31,7 @@
 $imports = $coreFile->getimports();
 
 $imports->addCoreFileImports(
-    $primitiveContainerInterface,
+    $elementInterface,
     $serializeConfigClass,
     $xmlWriterClass,
     $xmlValueLocationEnum,
@@ -47,13 +47,17 @@
 <?php echo ImportUtils::compileImportStatements($imports); ?>
 
 /**
- * This indicates an Element type that contains a "value" property, but must be serialized differently than
- * a primitive container
+ * This indicates an Element type that contains a "value" property
  */
-interface <?php echo $coreFile->getEntityName(); ?> extends <?php echo $primitiveContainerInterface->getEntityName(); ?>
+interface <?php echo $coreFile->getEntityName(); ?> extends <?php echo $elementInterface->getEntityName(); ?>
 
 {
-
+    /**
+     * Must return the appropriate "formatted" stringified version of this type's contained primitive type's value
+     *
+     * @return string
+     */
+    public function _getFormattedValue(): string;
 }
 
 <?php return ob_get_clean();
diff --git a/template/versions/types/class_default.php b/template/versions/types/class_default.php
index d667cd03..b874a0f0 100644
--- a/template/versions/types/class_default.php
+++ b/template/versions/types/class_default.php
@@ -16,7 +16,7 @@
  * limitations under the License.
  */
 
-use DCarbone\PHPFHIR\Utils\XMLValueLocationUtils;
+use DCarbone\PHPFHIR\Utilities\XMLValueLocationUtils;
 use DCarbone\PHPFHIR\Utilities\DocumentationUtils;
 use DCarbone\PHPFHIR\Utilities\TypeHintUtils;
 
@@ -53,7 +53,7 @@
 
         $propertyType = $property->getValueFHIRType(); ?>
     public const <?php echo $property->getFieldConstantName(); ?> = '<?php echo $property->getName(); ?>';
-<?php   if (null !== $propertyType && ($propertyType->isPrimitiveContainer() || $propertyType->isValueContainer())) :
+<?php   if (null !== $propertyType && ($propertyType->isPrimitiveContainer() || $propertyType->hasPrimitiveContainerParent())) :
     ?>    public const <?php echo $property->getFieldConstantName(); ?>_EXT = '<?php echo $property->getExtName(); ?>';
 <?php   endif;
     endforeach;
@@ -196,7 +196,7 @@ public function _getResourceType(): string
     );
 endif;
 
-if ($type->isValueContainer() || $type->hasValueContainerParent()) : ?>
+if ($type->isPrimitiveContainer() || $type->hasPrimitiveContainerParent()) : ?>
 
     /* <?php echo basename(__FILE__) . ':' . __LINE__; ?> */
     public function _nonValueFieldDefined(): bool
diff --git a/template/versions/types/properties/methods/default.php b/template/versions/types/properties/methods/default.php
index 76bca50d..0f7e4a75 100644
--- a/template/versions/types/properties/methods/default.php
+++ b/template/versions/types/properties/methods/default.php
@@ -17,7 +17,7 @@
  */
 
 use DCarbone\PHPFHIR\Enum\TypeKindEnum;
-use DCarbone\PHPFHIR\Utils\XMLValueLocationUtils;
+use DCarbone\PHPFHIR\Utilities\XMLValueLocationUtils;
 use DCarbone\PHPFHIR\Utilities\DocumentationUtils;
 use DCarbone\PHPFHIR\Utilities\TypeHintUtils;
 
@@ -120,7 +120,9 @@ public function <?php echo $property->getSetterName(); ?>(<?php echo TypeHintUti
         }
 <?php
     endif;
-    if ($propType->isValueContainer() || $propType->hasValueContainerParent() || $propType->isPrimitiveOrListType() || $propType->hasPrimitiveOrListParent()) : ?>
+    if ($propType->isPrimitiveOrListType() || $propType->hasPrimitiveOrListParent()
+        || $propType->isPrimitiveContainer() || $propType->hasPrimitiveContainerParent()
+        || $propType->isValueContainer() || $propType->hasValueContainerParent()) : ?>
         if (!($<?php echo $propertyName; ?> instanceof <?php echo $propTypeClassname; ?>)) {
             $<?php echo $propertyName; ?> = new <?php echo $propTypeClassname; ?>(value: $<?php echo $propertyName; ?>);
         }
@@ -173,7 +175,7 @@ public function set<?php echo ucfirst($propertyName); ?>(<?php echo TypeHintUtil
             return $this;
         }
 <?php
-        if ($propType->isValueContainer()) : ?>
+        if ($propType->isPrimitiveContainer() || $propType->hasPrimitiveContainerParent()) : ?>
         $this-><?php echo $propertyName; ?> = [];
         foreach($<?php echo $propertyName; ?> as $v) {
             if ($v instanceof <?php echo $propTypeClassname; ?>) {
@@ -217,28 +219,28 @@ public function _get<?php echo ucfirst($propertyName); ?>ValueXMLLocation() : <?
      */
     public function _set<?php echo ucfirst($propertyName); ?>ValueXMLLocation(<?php echo $valueXMLLocationEnum->getEntityName(); ?> $valueXMLLocation) : self
     {
-<?php if ($type->isPrimitiveContainer() || $type->hasPrimitiveContainerParent()) : ?>
+<?php   if ($type->isPrimitiveContainer() || $type->hasPrimitiveContainerParent()) : ?>
         if (<?php echo $valueXMLLocationEnum->getEntityName(); ?>::PARENT_ATTRIBUTE === $valueXMLLocation) {
             throw new \InvalidArgumentException(sprintf(
                 'Cannot set "%s" as value XML serialize location for property "<?php echo $propertyName; ?>" on value container type "<?php echo $type->getFHIRName(); ?>"',
                 $valueXMLLocation->name,
             ));
         }
-<?php elseif ($propType->isPrimitiveOrListType() || $propType->hasprimitiveType()) : ?>
+<?php   elseif ($propType->isPrimitiveOrListType() || $propType->hasprimitiveType()) : ?>
         if (<?php echo $valueXMLLocationEnum->getEntityName(); ?>::CONTAINER_ATTRIBUTE === $valueXMLLocation) {
             throw new \InvalidArgumentException(sprintf(
                 'Cannot set "%s" as value XML serialize location for primitive property "<?php echo $propertyName; ?>" on type "<?php echo $type->getfhirName(); ?>"',
                 $valueXMLLocation->name,
             ));
         }
-<?php endif; ?>
+<?php   endif; ?>
         $this->_valueXMLLocations[self::<?php echo $property->getFieldConstantName(); ?>] = $valueXMLLocation;
         return $this;
     }
 <?php endif;
 endforeach;
 
-if (($type->isValueContainer() && !$type->hasValueContainerParent()) || ($type->isQuantity() && !$type->hasQuantityParent())):
+if (($type->isPrimitiveContainer() && !$type->hasPrimitiveContainerParent()) || ($type->isValueContainer() && !$type->hasValueContainerParent())):
     $valueProp = $type->getProperties()->getProperty(PHPFHIR_VALUE_PROPERTY_NAME);
 ?>
 
diff --git a/template/versions/types/serialization/xml/serialize/body.php b/template/versions/types/serialization/xml/serialize/body.php
index e54a8a3e..bb370159 100644
--- a/template/versions/types/serialization/xml/serialize/body.php
+++ b/template/versions/types/serialization/xml/serialize/body.php
@@ -36,7 +36,7 @@
     $propType = $property->getValueFHIRType();
 
     if ($property->isValueProperty()) :
-        if ($type->isValueContainer() || $type->hasValueContainerParent()) : ?>
+        if ($type->isPrimitiveContainer() || $type->hasPrimitiveContainerParent()) : ?>
         if (isset($this-><?php echo $property->getName(); ?>) && <?php echo $xmlLocationEnum->getEntityName(); ?>::CONTAINER_ATTRIBUTE === $valueLocation) {
             $xw->writeAttribute(self::<?php echo $property->getFieldConstantName(); ?>, $this-><?php echo $property->getName(); ?>->_getFormattedValue());
         }
@@ -46,7 +46,7 @@
             $xw->writeAttribute(self::<?php echo $property->getFieldConstantName(); ?>, $this-><?php echo $property->getName(); ?>->_getFormattedValue());
         }
 <?php   endif;
-    elseif ($propType->isValueContainer() || $propType->hasValueContainerParent() || $propType->isPrimitiveOrListType() || $propType->hasPrimitiveOrListParent()) : ?>
+    elseif ($propType->isPrimitiveContainer() || $propType->hasPrimitiveContainerParent() || $propType->isPrimitiveOrListType() || $propType->hasPrimitiveOrListParent()) : ?>
         if (isset($this-><?php echo $property->getName(); ?>) && <?php echo $xmlLocationEnum->getEntityName(); ?>::PARENT_ATTRIBUTE === $this->_valueXMLLocations[self::<?php echo $property->getFieldConstantName(); ?>]) {
             $xw->writeAttribute(self::<?php echo $property->getFieldConstantName(); ?>, $this-><?php echo $property->getName(); ?>->_getFormattedValue());
         }
@@ -74,7 +74,7 @@
     $propTypeKind = $propType->getKind();
 
     // value property start
-    if (!$property->isCollection() && $property->isValueProperty() && ($type->isValueContainer() || $type->hasValueContainerParent())) : ?>
+    if (!$property->isCollection() && $property->isValueProperty() && ($type->isPrimitiveContainer() || $type->hasPrimitiveContainerParent())) : ?>
         if (isset($this-><?php echo $property->getName(); ?>)) {
             if (<?php echo $xmlLocationEnum->getEntityName(); ?>::CONTAINER_VALUE === $valueLocation) {
                 $xw->text($this-><?php echo $property->getName(); ?>->_getFormattedValue());
@@ -136,7 +136,7 @@
     // primitive type end
 
     // value container start
-    elseif ($propType->isValueContainer() || $propType->hasValueContainerParent()) :
+    elseif ($propType->isPrimitiveContainer() || $propType->hasPrimitiveContainerParent()) :
         if ($property->isCollection()) : ?>
         if (isset($this-><?php echo $property->getName(); ?>) && [] !== $this-><?php echo $property->getName(); ?>) {
             foreach($this-><?php echo $property->getName(); ?> as $v) {