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.. _rdata-set-classes:
Rdataset, RRset and Node Classes
================================
An ``Rdataset`` is a set of ``Rdata`` objects which all have the same
rdatatype, rdataclass, and covered type. ``Rdatasets`` also have a
``ttl`` (DNS time-to-live) field. Rdatasets support the normal Python
set API, but are also ordered.
An ``RRset`` is a subclass of ``Rdataset`` that also has an owner
name, i.e. a ``dns.name.Name`` that says where in the DNS tree this
set is located.
A ``Node`` is a set of ``Rdataset`` objects, the Rdatasets being
interpreted as at the same place (i.e. same owner name) int the DNS
tree. Nodes are primarily used in ``Zone`` objects.
.. autoclass:: dns.rdataset.Rdataset
:members:
.. autoclass:: dns.rrset.RRset
:members:
.. autoclass:: dns.node.Node
:members:
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