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Oxalis Community

Oxalis Community was founded by Peppol Service Providers running Oxalis implementations in late 2020, in order to secure continued active support and further development of the Oxalis software, the Oxalis AS4 plug in and the Vefa Peppol building blocks.

The Oxalis sample software was originally developed on behalf of the Norwegian Agency for Public Management and eGovernment (Difi) in 2011 order to support onboarding and growth in the Peppol network. The software was supported and further developed by Difi, according to the changing requirements of OpenPeppol. By 2020, Oxalis had established itself as the leading implementation in the Peppol network, with both a majority of all service providers and transaction volumes. 

Oxalis facilitated by NORSTELLA

For many years, Norway has been at the forefront when it comes to putting in place common solutions for the exchange of electronic trade documents in Europe, through the establishment of the Peppol standard. Several European countries (and in Asia – for example, Singapore) have in recent years made Peppol their national infrastructure for electronic invoicing.

Which trade documents are we talking about?

  • Orders and order confirmations

  • Packing slips

  • Invoices [1]


So that these kinds of trade documents easily can be sent and received across companies, institutions and individuals, we have established a digital infrastructure for electronic trade in Europe. This network is called Peppol (Pan European Public Procurement Online).


To become part of the Peppol network, companies must go via a so-called “access point”. This is a kind of electronic post office that sends and receives trade documents on your behalf. So, an eInvoice is sent into the Peppol network via the sender's access point and finds its own way to the recipient's access point, which places the invoice into the recipient's financial system. This way, both the sender and the recipient can enjoy all the benefits that come with electronic invoicing (see below about four specific benefits of eInvoices.


Everyone who implements the Peppol standard can implement such an access point and thereby communicate with everyone else in the Peppol network. The transfers that currently flow through this network go through either access points based on software from commercial software houses or on "open source" software. Today, more than 50% of all such transfers in the world go through an access point based on the Oxalis software.


The Oxalis software has been developed in Norway by Difi over more than 5 years. The EU has also contributed and financed some of the development, because they want a secure and efficient infrastructure for digital trade. When the acquisition part of Difi was transferred to DFØ, as of 1 September this year, it was decided that they would no longer engage in this. They eventually found a safe haven for Oxalis at the NorStella Foundation – a neutral, not-for-profit, member-run foundation.


[1] When agreements between parties have been entered into and implemented, invoices must be paid and money transferred between the parties' bank connections. Then the banks and the authorities, such as Økokrim (the Norwegian National Authority for Investigation and Prosecution of Economic and Environmental Crime) / the Norwegian Financial Intelligence Unit (EFE) get involved to be as efficient as possible in the analysis of payment transfers in Norway in order to stop attempts at money laundering and the financing of terrorism. Here, too, there is good cooperation between the private and public sectors through the DSOP programme.

On 19 November, a "founding meeting" was held for the Oxalis Community with 50 participants from all over the world – mostly from Europe, but also Asia. The 40 new member companies in the Oxalis Community (and, thereby, NORSTELLA) include Visma, Telenor and Basware , and they formally decided to create the Oxalis Community. The official owner of the Oxalis software will, when the GitHub ownership is transferred (before 1.12), be us here at NORSTELLA.


Message taken from GitHub (see more details at


Attached below is a little more information for those who are interested in the architecture – and statistics that, for example, show that of the transfers registered by Digdir (and those are not all), more than 6 million invoices went through the EHF/Peppol network in October 2020 alone, and of these, more than 50% were through an Oxalis access point.


When a consulting firm is to invoice a customer for hours spent on an assignment, an invoice is sent from the consulting firm's financial system to the client's financial system via this Peppol network – and thus two Oxalis access points (if, for example, the sender uses Xledger and the recipient uses Visma).


(Some of the text above about Peppol and EHF is taken from Digdir/DFØ and Visma).



NORSTELLA is the proud manager of the software and the opportunities it creates for increased digital collaboration and efficiency in a number of areas all around the world.


NORSTELLA is a not-for-profit foundation with the overall vision to contribute to better, increased, and simplified digital interaction between the public- and private sector. NORSTELLA is financed by membership fees, projects and services, such as administration of identifiers for digital customs clearance.  NORSTELLA has a long history of contribution to standardisation and harmonisation by development and promotion of standardised documents and management of identifiers.

Facilitating competence and industry networking

The major task for NORSTELLA is to facilitate competence and industry networking and there are currently seven active networking groups:

  1. Digital interaction, focusing on the relationship between the government and private enterprises in general.

  2. Digital executives, a forum for innovation and digitalisation.

  3. Digital municipalities and smart cities.

  4. Transport and logistics.

  5. Nordic Operator Forum for standardisation and related activities in e-commerce and e-invoicing.

  6. eID forum, where actors in the Norwegian electronic identity and trust services business meet with relevant actors from the public sector.

  7. The NORSTELLA Oxalis Community ​

Developing the ecommerce standards in Norway

NORSTELLA has been instrumental in the development of standards for electronic commerce in Norway, particularly in the standardisation of ecommerce messaging such as invoicing, customs clearance and transport related messaging. The ShortSeaXML project in shipping is one example. The Semicolon project on digital interaction in the public sector provided the foundation for much of the later work on digitalisation in Norway.

For more information about NORSTELLA (mostly in Norwegian) visit:

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