The market operator notes that in the next phase of optimizing automatic communication with market participants, the definition of namespaces in XML messages sent for gas will be gradually modified on the CS OTE test and production systems. The default xmlns namespace will now be replaced by the xmlns:n0 prefix. This change is in accordance with the XML format specification. This processing uses the standard SAP PROXY for generating output XML.

Market participants must verify whether their XML parsers are capable of processing such messages from OTE. The same change was implemented last year for electricity messages.

The change will gradually apply to all OTE and EDIGAS standard messages.

Currently, the following messages with the modified namespace are deployed in the CS OTE test environment (Sandbox):

• BALACT
• CDSGSDAT
• CDSAUCINF
• CDSGASREQ
• APERAK
• RESPONSE

These modifications will be deployed to production on April 1, 2026.

Deployment dates for modifications to other message types will be announced in subsequent messages.

Example of a message sent from OTE with the namespace:

xmlns:n0="http://www.ote-cr.cz/schema/response"

<n0:RESPONSE id="30000673243338" message-code="GCC" date-time="2026-03-02T12:38:37" dtd-version="1" dtd-release="1" xmlns:n0="http://www.ote-cr.cz/schema/response" xmlns:prx="urn:sap.com:proxy:CDX:/1SAI/TASE5FA88EE8340550FCA39:758">

<n0:SenderIdentification id="27XGOTE-CZ-GAS-R" coding-scheme="15"/>

<n0:ReceiverIdentification id="27XGOTE-CZ-GAS-R" coding-scheme="15"/>

<n0:Reference id="a"/>

<n0:Reason code="245" type="A03" block-id="1" result-code="G00003">Zpráva č. a byla v pořádku přijata</n0:Reason>

</n0:RESPONSE>