1 files changed, 8 insertions, 7 deletions

diff --git a/draft-schanzen-gns.xml b/draft-schanzen-gns.xml
index 160295e..c025ea2 100644
--- a/draft-schanzen-gns.xml
+++ b/draft-schanzen-gns.xml
@@ -458,9 +458,8 @@
        This number corresponds to a resource record type number
        identifying a delegation record type
        in the GNUnet Assigned Numbers Authority <xref target="GANA" />.
-       The ztype determines which cryptosystem is used for the
-       asymmetric and symmetric key operations of the zone and the format of
-       the delegation record type.
+       The ztype is a unique identifier for the set crypographic functions
+       of the zone and the format of the delegation record type.
        Any ztype <bcp14>MUST</bcp14> define the following set of cryptographic functions:
      </t>
      <dl>
@@ -526,13 +525,15 @@
      <t>
        The cryptographic functions of the default ztypes are specified with
        their corresponding delegation records in <xref target="gnsrecords_delegation"/>.
-       In order to support the specification of additional ztypes in the future,
-       for example if the
-       cryptographic mechanisms used in this document are broken.
+       In order to support cryptographic agility, additional ztypes <bcp14>MAY</bcp14>
+       be defined in the future which replace or update the default ztypes defined in this
+       document.
+       All ztypes <bcp14>MUST</bcp14> be registered as dedicated zone delegation
+       record types in the GNU Name System Record Types registry (see <xref target="gana"/>).
      </t>
      <section anchor="zTLD" numbered="true" toc="default">
        <name>Zone Top-Level Domain</name>
-              <t>
+       <t>
          The zTLD is the Zone Top-Level Domain.
          It is a string which encodes the zone type and zone key into a domain name.
          The zTLD is used as a globally unique reference to a specific