diff --git a/schema/lib/types/std.xsd b/schema/lib/types/std.xsd
index 9923d95..fee7c63 100644
--- a/schema/lib/types/std.xsd
+++ b/schema/lib/types/std.xsd
@@ -27,23 +27,33 @@
     </xs:complexType>
 
     <xs:simpleType name="t_std_cksum_hashtypes">
+        <!-- Geared towards python. -->
+        <!-- tuple(sorted(list(hashlib.algorithms_available.union(set(('adler32', 'crc32')))))) -->
         <xs:restriction base="xs:string">
             <xs:enumeration value="adler32"/>
+            <xs:enumeration value="blake2b"/>
+            <xs:enumeration value="blake2s"/>
             <xs:enumeration value="crc32"/>
+            <xs:enumeration value="md4"/>
             <xs:enumeration value="md5"/>
+            <xs:enumeration value="md5-sha1"/>
+            <xs:enumeration value="mdc2"/>
+            <xs:enumeration value="ripemd160"/>
             <xs:enumeration value="sha1"/>
             <xs:enumeration value="sha224"/>
             <xs:enumeration value="sha256"/>
             <xs:enumeration value="sha384"/>
-            <xs:enumeration value="sha512"/>
-            <xs:enumeration value="blake2b"/>
-            <xs:enumeration value="blake2s"/>
             <xs:enumeration value="sha3_224"/>
             <xs:enumeration value="sha3_256"/>
             <xs:enumeration value="sha3_384"/>
             <xs:enumeration value="sha3_512"/>
+            <xs:enumeration value="sha512"/>
+            <xs:enumeration value="sha512_224"/>
+            <xs:enumeration value="sha512_256"/>
             <xs:enumeration value="shake_128"/>
             <xs:enumeration value="shake_256"/>
+            <xs:enumeration value="sm3"/>
+            <xs:enumeration value="whirlpool"/>
             <xs:whiteSpace value="collapse"/>
         </xs:restriction>
     </xs:simpleType>