OCI vs. cXML - which one do I take?

OCI is traditionally SAP-centric, simpler, but less flexible. cXML is modern, Ariba/cloud standard, but more complex. If you have Ariba: cXML. If you have SAP SRM: OCI. Ideally both for maximum flexibility.

Can we migrate from OCI to cXML?

Yes, via Ovenca without disruption. You activate cXML for new catalogs while old OCI catalogs keep running. Gradual migration over weeks or months possible.

How secure are cXML transactions?

cXML uses HTTPS and digital signatures (RSA-SHA256). That's secure for transport. For critical data we recommend additionally encrypting payloads.

What does cXML integration cost more than OCI?

Technically: not much more. cXML is just more complex in configuration (more attributes, flexible validation). With Ovenca the additional costs are minimal - we have best-practice templates.

Can suppliers directly upload cXML catalogs?

Partially. cXML is primarily designed for punchout. For direct catalog upload we offer alternative formats (CSV, Excel, XML). Ovenca converts them internally.

Are there size limits for cXML payloads?

Theoretically no, but practically: cXML messages >100MB become slow. Typically 5-20MB payloads are standard. Ovenca streams large catalogs intelligently - no problem.

cXML - Ariba's XML Standard for B2B Catalogs

The modern standard for catalog integration in cloud ERPs

cXML (commerce eXtensible Markup Language) has been Ariba's answer to OCI since 1999. While OCI is traditionally SAP-centric, cXML has established itself as the standard in Ariba, AWS, and modern cloud ERPs. We explain when you need cXML.

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XML-based, highly flexible
Ariba standard since 1999
PunchOut & PunchOutOrderMessage
Modern cloud ERPs

cXML: The XML Counterpart to OCI

cXML is modern, data-rich, and flexible - but more complex. If you use Ariba or modern cloud ERPs like NetSuite, cXML is often the better choice over OCI. We explain why and how.

cXML Catalog Integration in Practice

PunchOut, order upload, and confirmation

PunchOut Initiation (XML)
The buyer clicks "Catalog" in Ariba. Ariba sends an XML request with PunchOutSetupRequest to Ovenca, including user, cost center, and target catalog.
- XML-based request
- SHA/HMAC signature
- User context included
Catalog Punchout & Shopping Cart
Ovenca receives the PunchOutSetupRequest, validates the signature, logs in the user, and displays the catalog. The user shops, items land in the shopping cart.
- Catalog UI
- Real-time pricing
- Inventory logic
PunchOutOrderMessage Return
When the user clicks "Order", Ovenca sends an XML message (PunchOutOrderMessage) with all shopping cart details back to Ariba - complete with item details, prices, attributes.
- XML payload with items
- Digital signature
- Automatic validation
Governance & Audit
All cXML transactions are logged. Admins see who ordered what, when, and at what prices. Compliance and audit trail are automatic.
- Transaction log
- Compliance report
- Error handling

cXML Expertise Without Ariba Lock-in

Many companies use Ariba and feel "locked in". Ovenca offers real cXML support - independent, open, and maintainable.

Combine cXML & OCI: You have old SAP SRM users (OCI) and new Ariba buyers (cXML)? Ovenca supports both side by side - without workarounds, without two systems.
Not Ariba-bound: Ovenca is Ariba-agnostic. Use NetSuite, Coupa, or your own ERP - Ovenca speaks cXML with everyone.
XML & JSON: Ovenca supports cXML and modern REST/JSON APIs in parallel. Migrate gradually to modern protocols without breaking legacy.
Flexible cXML Mapping: Every company uses cXML slightly differently (custom attributes, validation rules, etc.). Ovenca has flexible mapping - no big integration project.
Performance Over HTTPS: cXML runs via HTTPS. Ovenca is optimized for high throughput and accepts up to 10,000 concurrent punchouts without latency.
Debugging & Support: XML can be unreadable. We provide a cXML decode tool so you can inspect requests and responses live.

cXML: Questions and Answers

Ready for cXML-based catalogs?

Ariba, NetSuite, Coupa - all speak cXML. Ovenca is your neutral, maintainable platform for it. Let's discuss in a conversation how cXML fits your procurement.