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

libdap::AlarmHandler
libdap::Ancillary
libdap::Array	A multidimensional array of identical data types
libdap::ArrayGeoConstraint
libdap::AttrTable	Contains the attributes for a dataset
libdap::BaseType	The basic data type for the DODS DAP types
libdap::BaseTypeFactory
libdap::Byte	Holds a single byte
libdap::HTTPCacheTable::CacheEntry
libdap::ce_parser_arg
libdap::Clause	Holds a fragment of a constraint expression
libdap::Cmp< T1, T2 >
libdap::Connect	Holds information about the link from a DAP2 client to a dataset
libdap::ConstraintEvaluator	Evaluate a constraint expression
libdap::Constructor
libdap::DapIndent	Class with static methods to help with indentation of debug information
libdap::DapObj	Libdap base object for common functionality of libdap objects
libdap::DAS	Hold attribute data for a DAP2 dataset
libdap::DataDDS	Holds a DAP2 DDS
libdap::DDS
libdap::DDXParseFailed
libdap::DDXParser
libdap::Array::dimension
libdap::DODSFilter	Common functions for DODS server filter programs
libdap::AttrTable::entry
libdap::Error	A class for error processing
libdap::EventHandler
libdap::Float32	Holds a 32-bit floating point value
libdap::Float64	Holds a 64-bit (double precision) floating point value
libdap::GeoConstraint
libdap::Grid	Holds the Grid data type
libdap::GridGeoConstraint
libdap::gse_arg
libdap::GSEClause
libdap::HTTPCache
libdap::HTTPCacheInterruptHandler
libdap::HTTPCacheResponse
libdap::HTTPCacheTable
libdap::HTTPConnect
libdap::HTTPResponse
libdap::Int16	Holds a 16-bit signed integer value
libdap::Int32	Holds a 32-bit signed integer
libdap::InternalErr	A class for software fault reporting
libdap::Keywords
libdap::Marshaller	Abstract base class used to marshal/serialize dap data objects
libdap::parser_arg	Pass parameters by reference to a parser
libdap::PipeResponse	Encapsulate a response. This class provides special treatment for 'stream pipes.' It arranges to close them using pclose() instead of fclose()
libdap::RCReader
libdap::Resource	Associate a rule with an ancillary resource
libdap::Response
libdap::ResponseBuilder	Build responses for Hyrax server modules/handlers
libdap::ResponseTooBigErr
libdap::rvalue
libdap::Sequence	Holds a sequence
libdap::SignalHandler
libdap::SignalHandlerRegisteredErr
libdap::StdinResponse	Encapsulate a response read from stdin
libdap::Str	Holds character string data
libdap::StrCmp< T1, T2 >
libdap::Structure	Holds a structure (aggregate) type
libdap::SUCmp< T1, UT2 >
libdap::TestHandler
libdap::UInt16	Holds an unsigned 16-bit integer
libdap::UInt32	Holds a 32-bit unsigned integer
libdap::UnMarshaller	Abstract base class used to unmarshall/deserialize dap data objects
libdap::Url	Holds an Internet address (URL)
libdap::USCmp< UT1, T2 >
libdap::Vector	Holds a one-dimensional collection of DAP2 data types
libdap::XDRFileMarshaller	Marshaller that knows how to marshall/serialize dap data objects to a file using XDR
libdap::XDRFileUnMarshaller	Unmarshaller that knows how to unmarshall/deserialize dap objects using XDR from a file
libdap::XDRStreamMarshaller	Marshaller that knows how to marshal/serialize dap data objects to a C++ iostream using XDR
libdap::XDRStreamUnMarshaller	Unmarshaller that knows how to unmarshall/deserialize dap objects using XDR from a file
libdap::XDRUtils