Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 123]

▼NAdobeXMPCommon
▼CIConfigurable	Interface that allows to attach various key-value parameters to the underlying object
CCombinedDataValue	A union data type to store all kind of values
CIConfigurationManager_v1	Version1 of the interface that represents configuration settings controllable by the client
CIConfigurationManagerProxy
CIError_v1	Version1 of the interface that represents an error/warning encountered during processing
CIErrorNotifier_v1	Version1 of the interface that represents an interface to be implemented by client in case he is interested in getting notifications with respect to errors/warnings encountered by library
CIMemoryAllocator_v1	Version1 of the interface that represents an interface to be implemented by client in case he is interested in controlling the memory allocation and deallocation on the heap
CIObjectFactory_v1	Version1 of a interface that represents a factory to create various artifacts defined within AdobeXMPCommon namespace
CISharedObject	Interface that serves as the base interface of all the externally exposed interfaces
CIThreadSafe	Interface that serves as the base interface for all the externally exposed interfaces which needs to provide client configurable thread safety
CIUTF8String_v1	Version1 of the interface that represents an UTF8String
CIVersionable	Interface that serves as the base interface for all the externally exposed interfaces which needs to provide evolving versions of the interface
CReportErrorAndContinueFunctor	A Function object used by the client to report back and warnings to the library encountered during the serialization operation
▼NAdobeXMPCore
CIArrayNode_v1	Version1 of the interface that represents an Array Node of XMP DOM
CIClientDOMParser_v1	Version 1 of the interface that supports parsing by the client supplied parser of the XMP Data Model
CIClientDOMSerializer_v1	Version 1 of the interface that supports serializing by the client supplied serializer of the XMP Data Model
CICompositeNode_v1	Version1 of the interface that serves as a base interface to all composite types of nodes in the XMP DOM ( like Arrays and Structures )
CICoreConfigurationManager_v1	Version1 of the interface that represents configuration settings controllable by the client
CICoreObjectFactory_v1	Version1 of a interface that represents a factory to create various artifacts of XMP DOM like array, structure, path etc
CIDOMImplementationRegistry_v1	Version1 of the interface that serves as a database/registry of all the parsers and serializers available with the XMPCore library
CIDOMParser_v1	Version 1 of the interface that supports parsing of the XMP Data Model
CIDOMSerializer_v1	Version1 of the interface that represents an object that can serialize an XMP Data Model to a buffer. Provides the functions to serialize the XMP Data Model
CIMetadata_v1	Version1 of the interface that represents the whole xmp metadata for an asset
CIMetadataConverterUtils_v1	Version1 of the interface that represents an utility functions that can convert old xmp object(SXMPMeta) to new xmp object(IMetadata) and vice versa
CINameSpacePrefixMap_v1	Version1 of the interface that represents map where each entry consists of prefix string as the key and corresponding nameSpace string as its value
CINode_v1	Version1 of the interface that serves as a base interface to all types of nodes in the XMP DOM
CINodeIterator_v1	Interface that represents an iterator over the mutable children of a XMP DOM Node
CIPath_v1	Version1 of the interface that provides an easy iterative description of a specific path into the XMP tree
CIPathSegment_v1	Version1 of the interface that represents one segment in a path to a node into the XMP tree
CISimpleNode_v1	Version1 of the interface that represents a Simple Property Node of XMP DOM
CIStructureNode_v1	Version1 of the interface that represents a structure Node of XMP DOM
CTXMPFiles	API for access to the main (document-level) metadata in a file
CTXMPIterator	API for access to the XMP Toolkit iteration services
CTXMPMeta	API for access to the XMP Toolkit core services
CTXMPUtils	API for access to the XMP Toolkit utility services
CWXMP_Result
CXMP_DateTime	The expanded type for a date and time
CXMP_Error	XMP Toolkit error, associates an error code with a descriptive error string
CXMP_IO	Abstract base class for client-managed I/O with `TXMPFiles`
CXMP_PacketInfo	XMP packet description
CXMP_VersionInfo	XMP Toolkit version information