Added external ref for citation

Signed-off-by: Steve Springett <[email protected]>

Author: stevespringett

schema/bom-1.7.proto

@@ -322,6 +322,8 @@ enum ExternalReferenceType {
   EXTERNAL_REFERENCE_TYPE_RFC_9116 = 41;
   // Reference to release notes
   EXTERNAL_REFERENCE_TYPE_RELEASE_NOTES = 42;
+  // A reference to external citations applicable to the object identified by this BOM entry or the BOM itself. When used with a BOM-Link, this allows offloading citations into a separate CycloneDX BOM.
+  EXTERNAL_REFERENCE_TYPE_CITATION = 43;
 }
 
 enum HashAlg {

schema/bom-1.7.schema.json

@@ -1812,6 +1812,7 @@
             "electronic-signature",
             "digital-signature",
             "rfc-9116",
+            "citation",
             "other"
           ],
           "meta:enum": {
@@ -1857,6 +1858,7 @@
             "electronic-signature": "An e-signature is commonly a scanned representation of a written signature or a stylized script of the person's name.",
             "digital-signature": "A signature that leverages cryptography, typically public/private key pairs, which provides strong authenticity verification.",
             "rfc-9116": "Document that complies with [RFC 9116](https://www.ietf.org/rfc/rfc9116.html) (A File Format to Aid in Security Vulnerability Disclosure)",
+            "citation": "A reference to external citations applicable to the object identified by this BOM entry or the BOM itself. When used with a BOM-Link, this allows offloading citations into a separate CycloneDX BOM.",
             "other": "Use this if no other types accurately describe the purpose of the external reference."
           }
         },

schema/bom-1.7.xsd

@@ -1578,6 +1578,11 @@ limitations under the License.
                     <xs:documentation>Document that complies with RFC-9116 (A File Format to Aid in Security Vulnerability Disclosure)</xs:documentation>
                 </xs:annotation>
             </xs:enumeration>
+            <xs:enumeration value="citation">
+                <xs:annotation>
+                    <xs:documentation>A reference to external citations applicable to the object identified by this BOM entry or the BOM itself. When used with a BOM-Link, this allows offloading citations into a separate CycloneDX BOM.</xs:documentation>
+                </xs:annotation>
+            </xs:enumeration>
             <xs:enumeration value="other">
                 <xs:annotation>
                     <xs:documentation>Use this if no other types accurately describe the purpose of the external reference</xs:documentation>