Wiki
https://en.wikipedia.org/wiki/Security_Assertion_Markup_Language
https://en.wikipedia.org/wiki/SAML_2.0
SAML for Web Developers
SAML Online tools
https://www.samltool.com/online_tools.php
Security Assertion Markup Language (SAML) is an XML-based, open-standard data format for exchanging authentication and authorization data between parties, in particular, between an identity provider and a service provider [...]. The single most important requirement that SAML addresses is web browser single sign-on (SSO).
The SAML specification defines three roles: the principal (typically a user), the Identity provider (IdP), and the service provider (SP).
Related technologies: XML, XSD, XML Signature, XML Encryption, SOAP, HTTP.
SAML defines XML-based assertions and protocols, bindings, and profiles.
A SAML binding determines how SAML requests and responses map onto standard messaging or communications protocols. An important (synchronous) binding is the SAML SOAP binding.