diff --git a/src/metaschema/oscal_implementation-common_metaschema.xml b/src/metaschema/oscal_implementation-common_metaschema.xml
index 199eb552ee..68097e6bae 100644
--- a/src/metaschema/oscal_implementation-common_metaschema.xml
+++ b/src/metaschema/oscal_implementation-common_metaschema.xml
@@ -109,6 +109,7 @@
                         <!-- ========================================================================================================== -->
             &allowed-values-component_component_link-rel;
                         <enum value="uses-network">This component uses the network provided by the identified network component.</enum>
+                        <enum value="imported-from">The hyperlink identifies a URI pointing to the <code>component</code> in a <code>component-definition</code> that originally defined the <code>component</code>.</enum>
                   </allowed-values>
 
                   <allowed-values target="responsible-role/@role-id" allow-other="yes">
diff --git a/src/metaschema/oscal_ssp_metaschema.xml b/src/metaschema/oscal_ssp_metaschema.xml
index de446373a2..8f64ae5e3e 100644
--- a/src/metaschema/oscal_ssp_metaschema.xml
+++ b/src/metaschema/oscal_ssp_metaschema.xml
@@ -1020,6 +1020,10 @@
       <field ref="remarks" in-xml="WITH_WRAPPER"/>
     </model>
     <constraint>
+      <allowed-values target="link/@rel" allow-other="yes">
+        <!-- TODO: More work needs to be done around link enforcement constraints and requires Metaschema work on recurse-depth-first() recursive index searching. -->
+        <enum value="imported-from">The hyperlink identifies a URI pointing to the <code>component</code> in a <code>component-definition</code> that originally defined the <code>component</code>.</enum>
+      </allowed-values>
       <allowed-values target=".//responsible-role/@role-id" allow-other="yes">
             &allowed-values-responsible-roles-operations;
             &allowed-values-responsible-roles-component-production;