diff --git a/schema/bom-1.4.schema.json b/schema/bom-1.4.schema.json
index dafd8845..d9b265f9 100644
--- a/schema/bom-1.4.schema.json
+++ b/schema/bom-1.4.schema.json
@@ -1617,7 +1617,7 @@
               "ref": {
                 "$ref": "#/definitions/refType",
                 "title": "Reference",
-                "description": "References a component or service by the objects bom-ref"
+                "description": "References a component or service by the objects bom-ref if defined within the same BOM or BOM-Link https://cyclonedx.org/capabilities/bomlink/ if defined in a separate BOM."
               },
               "versions": {
                 "type": "array",
diff --git a/schema/bom-1.4.xsd b/schema/bom-1.4.xsd
index 9b38b1cf..1d6c84ce 100644
--- a/schema/bom-1.4.xsd
+++ b/schema/bom-1.4.xsd
@@ -1971,7 +1971,7 @@ limitations under the License.
                                 <xs:sequence minOccurs="0" maxOccurs="1">
                                     <xs:element name="ref" minOccurs="1" maxOccurs="1">
                                         <xs:annotation>
-                                            <xs:documentation>References a component or service by the objects bom-ref.</xs:documentation>
+                                            <xs:documentation>References a component or service by the objects bom-ref if defined within the same BOM or BOM-Link https://cyclonedx.org/capabilities/bomlink/ if defined in a separate BOM.</xs:documentation>
                                         </xs:annotation>
                                     </xs:element>
                                     <xs:element name="versions" minOccurs="0" maxOccurs="1">