Here is a list of all documented namespaces with brief descriptions:

[detail level 1234]

▼Nopensaml	Common classes for OpenSAML library
▼Nsaml1p
CSAML1MessageDecoder	Base class for SAML 1.x MessageDecoders
CSAML1SOAPClient	Client class for SAML 1.x SOAP binding
CSAMLArtifactType0001	Type 0x0001 SAML 1.x artifact class
CSAMLArtifactType0002	Type 0x0002 SAML 1.x artifact class
▼Nsaml2
CSAML2AssertionPolicy	Policy subclass to track SAML 2.0 Assertion SubjectConfirmation
▼Nsaml2md
CAbstractDynamicMetadataProvider	Simple implementation of a dynamic, caching MetadataProvider
CAbstractMetadataProvider	Base class for caching metadata providers
CDiscoverableMetadataProvider	A metadata provider that provides a JSON feed of IdP discovery information
CEndpointManager	Template for processing unindexed endpoint information
CIndexedEndpointManager	Template for processing indexed endpoint information
CEntityMatcher	An entity matcher is a predicate that evaluates an entity against a set of matching rules
CMetadataCredentialContext	Metadata-based CredentialContext subclass
CMetadataCredentialCriteria	Metadata-based CredentialCriteria subclass
CMetadataFilterContext	Marker interface for supplying environmental context to filters
CBatchLoadMetadataFilterContext	Environmental context for filtering of batch-loaded metadata
CMetadataFilter	A metadata filter is used to process metadata after resolution and unmarshalling
CMetadataFilterException	Exceptions related to metadata filtering
▼CMetadataProvider	Supplies an individual source of metadata
CCriteria	Batches up criteria for entity lookup
CMetadataException	Exceptions related to metadata use
▼CObservableMetadataProvider	A metadata provider that notifies interested parties of changes
CObserver	An observer of metadata provider changes
▼Nsaml2p
CSAML2Artifact	Base class for SAML 2.0 artifacts
CSAML2ArtifactType0004	Type 0x0004 SAML 2.0 artifact class
CSAML2MessageDecoder	Base class for SAML 2.0 MessageDecoders
CSAML2MessageEncoder	Base class for SAML 2.0 MessageEncoders
CSAML2SOAPClient	Specialized SOAPClient for SAML 2.0 SOAP binding
CArtifactMap	Helper class for SAMLArtifact mapping and retrieval
▼CMessageDecoder	Interface to SAML protocol binding message decoders
CArtifactResolver	Interface to caller-supplied artifact resolution mechanism
▼CMessageEncoder	Interface to SAML protocol binding message encoders
CArtifactGenerator	Interface to caller-supplied artifact generation mechanism
CSAMLArtifact	Base class for SAML 1.x and 2.0 artifacts
CArtifactException	Exceptions related to artifact parsing
▼CSecurityPolicy	A policy used to verify the security of an incoming message
CIssuerMatchingPolicy	Allows override of rules for comparing saml2:Issuer information
CSecurityPolicyRule	A rule that a protocol request and message must meet in order to be valid and secure
CSOAPClient	Specialized SOAPClient for SAML SOAP bindings
CEncryptedKeyResolver	SAML-specific encrypted key resolver
CSecurityPolicyException	Exceptions in security policy processing
CBindingException	Exceptions in SAML binding processing
CProfileException	Exceptions in SAML profile processing
CFatalProfileException	Fatal exceptions in SAML profile processing
CRetryableProfileException	Non-fatal exceptions in SAML profile processing
CRootObject	Base class for SAML objects at the root of core schemas
CAssertion	Base class for SAML assertions
CStatus	Base class for SAML status codes
CSAMLConfig	Singleton object that manages library startup/shutdown.configuration
CContentReference	SAML-specific signature reference profile
CSignableObject	Base class for SAML objects that can be signed
CSignatureProfileValidator	SAML-specific signature profile validator
CCommonDomainCookie	Helper class for maintaining discovery cookie
Nsamlconstants	SAML-related constants