'Updates a record set within a DNS zone.
:param resource_group_name: The name of the resource group.
:type resource_group_name: str
:param zone_name: The name of the DNS zone (without a terminating
dot).
:type zone_name: str
:param relative_record_set_name: The name of the record set, relative
to the name of the zone.
:type relative_record_set_name: str
:param record_type: The type of DNS record in this record set.
Possible values include: \'A\', \'AAAA\', \'CNAME\', \'MX\', \'NS\', \'PTR\',
\'SOA\', \'SRV\', \'TXT\'
:type record_type: str or :class:`RecordType
<azure.mgmt.dns.models.RecordType>`
:param parameters: Parameters supplied to the Update operation.
:type parameters: :class:`RecordSet <azure.mgmt.dns.models.RecordSet>`
:param if_match: The etag of the record set. Omit this value to always
overwrite the current record set. Specify the last-seen etag value to
prevent accidentally overwritting concurrent changes.
:type if_match: str
:param dict custom_headers: headers that will be added to the request
:param bool raw: returns the direct response alongside the
deserialized response
:param operation_config: :ref:`Operation configuration
overrides<msrest:optionsforoperations>`.
:rtype: :class:`RecordSet <azure.mgmt.dns.models.RecordSet>`
:rtype: :class:`ClientRawResponse<msrest.pipeline.ClientRawResponse>`
if raw=true
:raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`'

def update(self, resource_group_name, zone_name, relative_record_set_name, record_type, parameters, if_match=None, custom_headers=None, raw=False, **operation_config):

    url = '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Network/dnsZones/{zoneName}/{recordType}/{relativeRecordSetName}'
    path_format_arguments = {'resourceGroupName': self._serialize.url('resource_group_name', resource_group_name, 'str'), 'zoneName': self._serialize.url('zone_name', zone_name, 'str'), 'relativeRecordSetName': self._serialize.url('relative_record_set_name', relative_record_set_name, 'str', skip_quote=True), 'recordType': self._serialize.url('record_type', record_type, 'RecordType'), 'subscriptionId': self._serialize.url('self.config.subscription_id', self.config.subscription_id, 'str')}
    url = self._client.format_url(url, **path_format_arguments)
    query_parameters = {}
    query_parameters['api-version'] = self._serialize.query('self.api_version', self.api_version, 'str')
    header_parameters = {}
    header_parameters['Content-Type'] = 'application/json;    charset=utf-8'
    if self.config.generate_client_request_id:
        header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
    if custom_headers:
        header_parameters.update(custom_headers)
    if (if_match is not None):
        header_parameters['If-Match'] = self._serialize.header('if_match', if_match, 'str')
    if (self.config.accept_language is not None):
        header_parameters['accept-language'] = self._serialize.header('self.config.accept_language', self.config.accept_language, 'str')
    body_content = self._serialize.body(parameters, 'RecordSet')
    request = self._client.patch(url, query_parameters)
    response = self._client.send(request, header_parameters, body_content, **operation_config)
    if (response.status_code not in [200]):
        exp = CloudError(response)
        exp.request_id = response.headers.get('x-ms-request-id')
        raise exp
    deserialized = None
    if (response.status_code == 200):
        deserialized = self._deserialize('RecordSet', response)
    if raw:
        client_raw_response = ClientRawResponse(deserialized, response)
        return client_raw_response
    return deserialized
