The document provides an overview and definitions of key concepts related to installing and configuring Shibboleth identity provider (IdP) software, including: 1) It describes the directory structure and files included in a default Shibboleth IdP installation. 2) It explains how metadata from identity providers and service providers is loaded and managed through metadata providers configured in the relying-party.xml file. 3) It provides an example configuration of the UK Federation metadata provider to load metadata over HTTP and validate signatures. 4) It discusses login handler and authentication mechanism configurations in handler.xml to define how users authenticate to the IdP.