Standard Based PaaS?

Summary:

Does OCPQ follow standards?

Content (please ensure you mask any confidential information):

This page states the following:

Unlike Salesforce’s CPQ, which relies on third-party integrations and partner solutions to fill integration gaps1, Oracle’s CPQ allows you to invest in a single, forward-looking solution that’s not tied to one proprietary platform. Save time and money by choosing the one CPQ solution which is supported by an industry-leading, open, and standards-based PaaS to meet all your organization’s needs.

Does this mean that CPQ follows any open standards? Which one(s) does it refer to?