The XMPP Standards Foundation (XSF) is a nonprofit organization that defines open protocols for real-time communication over XMPP. The XSF provides resources for XMPP developers, service providers, and users. It has a membership program and defines standards through XMPP Extension Protocols (XEPs). The XEP process involves submission, public discussion, approval by the XSF council, and publication of final standardized extensions. The XSF aims to solve problems and enable innovative features through open standards development.