This inheritance list is sorted roughly, but not completely, alphabetically:

CTopologyRefiner::AdaptiveOptions	Adaptive refinement options
CBufferDescriptor	BufferDescriptor is a struct which describes buffer elements in interleaved data buffers. Almost all Osd Evaluator APIs take BufferDescriptors along with device-specific buffer objects
CPatchMap::QuadNode::Child
CRefinement::ChildTag
CCLEvaluator
CCLStencilTable	OpenCL stencil table
CCLVertexBuffer	Concrete vertex buffer class for OpenCL subdivision
CConstArray< TYPE >
CArray< TYPE >
CConstArray< CreaseEndPair >
CArray< CreaseEndPair >
CConstArray< Index >
CArray< Index >
CConstArray< LocalIndex >
CArray< LocalIndex >
CConstArray< PatchParam >
CArray< PatchParam >
CConstArray< ValueTag >
CArray< ValueTag >
CCpuD3D11VertexBuffer	Concrete vertex buffer class for Cpu subdivision and DirectX drawing
CCpuEvaluator
CCpuGLVertexBuffer	Concrete vertex buffer class for cpu subdivision and OpenGL drawing
CCPUMTLVertexBuffer
CCpuPatchTable	Cpu patch table
CCpuVertexBuffer	Concrete vertex buffer class for CPU subdivision
CCrease	Types, constants and utilities related to semi-sharp creasing – whose implementation is independent of the subdivision scheme
CFVarLevel::CreaseEndPair
CCudaEvaluator
CCudaStencilTable	CUDA stencil table
CCudaVertexBuffer	Concrete vertex buffer class for Cuda subdivision
CD3D11ComputeEvaluator
CD3D11StencilTable	D3D11 stencil table
CD3D11VertexBuffer	Concrete vertex buffer class for DirectX subdivision and DirectX drawing
CEdgeInterface
CEvaluatorCacheT< EVALUATOR >::Entry
CFVarLevel::ETag
CLevel::ETag
CEvaluatorCacheT< EVALUATOR >
CFaceInterface
CLevel::FTag
CTopologyDescriptor::FVarChannel
CFVarLevel
CFVarRefinement
CGLComputeEvaluator
CGLSLPatchShaderSource
CGLStencilTableSSBO	GL stencil table (Shader Storage buffer)
CGLStencilTableTBO	GL TextureBuffer stencil table
CGLVertexBuffer	Concrete vertex buffer class for GLSL subdivision and OpenGL drawing
CGLXFBEvaluator
CHLSLPatchShaderSource
CLevel
CLimitStencilTableFactoryReal< REAL >	A specialized factory for LimitStencilTable
CLimitStencilTableFactoryReal< float >
CLimitStencilTableFactory	Stencil table factory class wrapping the template for compatibility
CScheme< SCHEME_TYPE >::LocalMask< WEIGHT >
CLimitStencilTableFactoryReal< REAL >::LocationArray	Descriptor for limit surface locations
CMeshInterface< PATCH_TABLE >
CMesh< VERTEX_BUFFER, STENCIL_TABLE, EVALUATOR, PATCH_TABLE, DEVICE_CONTEXT >
CMTLComputeEvaluator
CMTLContext
CMTLPatchShaderSource
CMTLStencilTable
CNonCopyable< T >
CNonCopyable< CLPatchTable >
CCLPatchTable	CL patch table
CNonCopyable< CudaPatchTable >
CCudaPatchTable	CUDA patch table
CNonCopyable< D3D11LegacyGregoryPatchTable >
CD3D11LegacyGregoryPatchTable
CNonCopyable< D3D11PatchTable >
CD3D11PatchTable
CNonCopyable< GLLegacyGregoryPatchTable >
CGLLegacyGregoryPatchTable
CNonCopyable< GLPatchTable >
CGLPatchTable
CNonCopyable< MTLLegacyGregoryPatchTable >
CMTLLegacyGregoryPatchTable
CNonCopyable< MTLPatchTable >
CMTLPatchTable
COmpEvaluator
CLimitStencilTableFactoryReal< REAL >::Options
CPatchTableFactory::Options	Public options for the PatchTable factory
CStencilTableFactoryReal< REAL >::Options
CTopologyRefinerFactory< MESH >::Options	Options related to the construction of each TopologyRefiner
COptions	All supported options applying to subdivision scheme
CRefinement::Options
CPatchArray
CPatchCoord	Coordinates set on a patch table
CPatchDescriptor	Describes the type of a patch
CPatchTableFactory::PatchFaceTag	Obsolete internal struct not intended for public use – due to be deprecated
CPatchTable::PatchHandle	Handle that can be used as unique patch identifier within PatchTable
CPatchMap	An quadtree-based map connecting coarse faces to their sub-patches
CPatchParam	Patch parameterization
CPatchParam
CPatchTable	Container for arrays of parametric patches
CPatchTableFactory	Factory for constructing a PatchTable from a TopologyRefiner
CPrimvarRefinerReal< REAL >	Applies refinement operations to generic primvar data
CPrimvarRefinerReal< float >
CPrimvarRefiner
CPtexIndices	Object used to compute and query ptex face indices
CRefinement
CRefinement::Relations
CScheme< SCHEME_TYPE >	Scheme is a class template which provides all implementation for the subdivision schemes supported by OpenSubdiv through specializations of the methods of each. An instance of Scheme<SCHEME_TYPE> includes a set of Options that will dictate the variable aspects of its behavior
CSchemeTypeTraits	Traits associated with the types of all subdivision schemes – parameterized by the scheme type. All traits are also defined in the scheme itself
CSparseSelector
CRefinement::SparseTag
CStackBuffer< TYPE, SIZE, POD_TYPE >
CStencilReal< REAL >	Vertex stencil descriptor
CLimitStencilReal< REAL >	Limit point stencil descriptor
CStencilReal< float >
CLimitStencilReal< float >
CLimitStencil	Limit point stencil class wrapping the template for compatibility
CStencil	Vertex stencil class wrapping the template for compatibility
CStencilTableFactoryReal< REAL >	A specialized factory for StencilTable
CStencilTableFactoryReal< float >
CStencilTableFactory	Stencil table factory class wrapping the template for compatibility
CStencilTableReal< REAL >	Table of subdivision stencils
CLimitStencilTableReal< REAL >	Table of limit subdivision stencils
CStencilTableReal< float >
CLimitStencilTableReal< float >
CLimitStencilTable	Limit stencil table class wrapping the template for compatibility
CStencilTable	Stencil table class wrapping the template for compatibility
CTbbEvaluator
CTopologyDescriptor	A simple reference to raw topology data for use with TopologyRefinerFactory
CTopologyLevel	An interface for accessing data in a specific level of a refined topology hierarchy
CTopologyRefiner	Stores topology data for a specified set of refinement options
CTopologyRefinerFactoryBase	Private base class of Factories for constructing TopologyRefiners
CTopologyRefinerFactory< MESH >	Factory for constructing TopologyRefiners from specific mesh classes
CTopologyRefiner::UniformOptions	Uniform refinement options
CFVarLevel::ValueTag
CVertexInterface
CLevel::VSpan
CLevel::VTag