A few of the class/javadoc links in the various configuration topics may not yet be updated after the V5 release. Feel free to file Jira issues if you find specific cases.
The <MetadataProvider> element supports a large number of XML attributes. For convenience, these are grouped into the following categories:
Supported on all metadata provider types (with some noted exceptions)
Supported on the reloading metadata providers: https://shibboleth.atlassian.net/wiki/spaces/IDP5/pages/3199507721 , https://shibboleth.atlassian.net/wiki/spaces/IDP5/pages/3199506905 , and https://shibboleth.atlassian.net/wiki/spaces/IDP5/pages/3199506865
Supported on the dynamic metadata providers: https://shibboleth.atlassian.net/wiki/spaces/IDP5/pages/3199506816 and https://shibboleth.atlassian.net/wiki/spaces/IDP5/pages/3199506968
Supported on the HTTP metadata providers: https://shibboleth.atlassian.net/wiki/spaces/IDP5/pages/3199506816 and https://shibboleth.atlassian.net/wiki/spaces/IDP5/pages/3199506865
The content on the child pages themselves is intentionally taken out of context. The child pages function as include documents for all of the metadata provider pages including the pages listed above.