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

[detail level 1234]

CAL::usdmaya::fileio::AnimationTranslator	A utility class to help with exporting animated plugs from maya
CAL::maya::CommandGuiHelper	This class isn't really a wrapper around command options as such, it's mainly just a helper to auto generate some GUI code to create a menu item + option box dialog
▼CAL::maya::DgNodeHelper	Utility class that provides support for setting/getting attributes
▼CAL::usdmaya::fileio::translators::DgNodeTranslator	Utility class that transfers DgNodes between Maya and USD
▼CAL::usdmaya::fileio::translators::DagNodeTranslator	A class to transfer dag node data between Usd <–> Maya
CAL::usdmaya::fileio::translators::CameraTranslator	A class to transfer camera data between Usd <–> Maya
CAL::usdmaya::fileio::translators::MeshTranslator	A class to transfer mesh data between Usd <–> Maya
CAL::usdmaya::fileio::translators::NurbsCurveTranslator	A utility class to transfer nurbs curves between maya and usd
CAL::usdmaya::fileio::translators::TransformTranslator	A utility class to transfer transform nodes between Maya and USD
CAL::usdmaya::fileio::Export	A class that wraps up the entire export process
CAL::usdmaya::fileio::ExporterParams	Parameters for the exporter. These parameters are constructed by any command or file translator that wishes to export data from maya, which are then passed to the AL::usdmaya::fileio::Export class to perform the actual export work
▼CFactoryBase
▼CAL::usdmaya::fileio::translators::TranslatorFactoryBase	Factory interface, used to create an instance of a particular translator type
CAL::usdmaya::fileio::translators::TranslatorFactory< T >	Factory instance for a given translator type
CAL::maya::FileTranslatorOptions	Utility class that constructs the file translator export GUI from the export options you want to support
CAL::usdmaya::Global	This class wraps all of the global state/mechanisms needed to integrate USD and Maya. This mainly handles things such as onFileNew, preFileSave, etc. Hopefully the contents of the cpp file will be as minimal as possible
CAL::usdmaya::guid	A type to store a UUID from a maya node
CAL::usdmaya::guid_compare	Less than comparison utility for sorting via 128bit guid
Cstd::hash< AL::maya::ProfilerSectionPath >
Cstd::hash< AL::maya::ProfilerSectionTag >
CAL::usdmaya::fileio::Import	A class that performs the import of data from USD into Maya
CAL::usdmaya::fileio::ImporterParams	Parameters for the importer
CAL::usdmaya::nodes::LayerVisitor	A class that follows the visitor pattern to walk through all layer nodes associated with the specified proxy shape node
CAL::maya::MenuBuilder::Menu
CAL::maya::MenuBuilder	You shouldn't need to care about this class (sort of). Probably the only thing you'll want to do is execute
CAL::maya::MenuBuilder::MenuItem	A structure that represents a menu item
CAL::usdmaya::MObjectMap	A class that acts as a lookup table for dependency nodes. It works by storing a sorted map based on the uuid of each node
▼CMPxCommand
CAL::maya::CommandGuiListGen	A method used by the generated command GUI code to retrieve a list of items from C++
▼CAL::usdmaya::cmds::LayerCommandBase	Helper class
CAL::usdmaya::cmds::LayerCreateSubLayer	Given some selected proxy shape node, create a new sub layer for the current edit target
CAL::usdmaya::cmds::LayerCurrentEditTarget	Get / Set the current edit target for the stage
CAL::usdmaya::cmds::LayerExport	Export a layer to the given filename
CAL::usdmaya::cmds::LayerGetLayers	Given some selected proxy shape node, return the layer names
CAL::usdmaya::cmds::LayerSave	Save the specified layer
CAL::usdmaya::cmds::LayerSetMuted	Get / Set whether the layer is currently muted
▼CAL::usdmaya::cmds::ProxyShapeCommandBase	Base class for all proxy shape commands. Sets up some common command syntax, along with a few handy utility methods
CAL::usdmaya::cmds::ChangeVariant	A command to force a variant switch
CAL::usdmaya::cmds::ProxyShapeFindLoadable	ProxyShapeFindLoadable
CAL::usdmaya::cmds::ProxyShapeImportAllTransforms	ProxyShapeImportAllTransforms From a proxy shape, this will import all usdPrims in the stage as AL_usdmaya_Transform nodes
CAL::usdmaya::cmds::ProxyShapeImportPrimPathAsMaya	ProxyShapeImportPrimPathAsMaya A command that will import a portion of a proxyNode as Maya geometry/transforms
CAL::usdmaya::cmds::ProxyShapePrintRefCountState	ProxyShapePrintRefCountState
CAL::usdmaya::cmds::ProxyShapeRemoveAllTransforms	ProxyShapeRemoveAllTransforms A command that will remove all AL::usdmaya::nodes::Transform nodes from a given AL_usd_ProxyShape
CAL::usdmaya::cmds::ProxyShapeImport	Imports a proxy shape into maya
CAL::usdmaya::fileio::ExportCommand	A thin MEL command layer that just wraps the AL::usdmaya::fileio::Export process
CAL::usdmaya::fileio::ImportCommand	A command to import a USD file into Maya (supporting A20 specific requirements)
▼CMPxDrawOverride
CAL::usdmaya::nodes::ProxyDrawOverride	This class provides the draw override for the USD proxy shape node
▼CMPxFileTranslator
CAL::maya::FileTranslatorBase< T >	A utility class that provides a 'unique' base class to derive new translator from
▼CMPxGeometryData
CAL::usdmaya::StageData	This code is effectively copied from the pixar plugin. It's just used to pass the usd stage through the DG
▼CMPxNode
CAL::usdmaya::nodes::Layer	The layer node stores a reference to an SdfLayer
▼CMPxSurfaceShape
CAL::usdmaya::nodes::ProxyShape	A custom proxy shape node that attaches itself to a USD file, and then renders it. The stage is held internally as a member variable, and it will be composed based on a change to the "filePath" attribute
▼CMPxSurfaceShapeUI
CAL::usdmaya::nodes::ProxyShapeUI	The UI component of the proxy shape node
▼CMPxTransform
CAL::usdmaya::nodes::Transform	The AL::usdmaya::nodes::Transform node is a custom transform node that allows you to manipulate a USD
▼CMPxTransformationMatrix
CAL::usdmaya::nodes::TransformationMatrix	This class provides a transformation matrix that allows you to apply tweaks over some read only transformation information extracted from a UsdPrim. Currently each tweak is a simple offset over the values contained within the UsdPrim
CAL::usdmaya::fileio::NodeFactory	A simple node factory to convert nodes between Maya and USD
▼CAL::maya::NodeHelper	This is a little helper object designed to reduce the amount of boilerplate GUI code you need to jump through to add your own nodes that match a USD schema type. It has been designed to attempt to match the attribute types of USD as closely as possible, so adds support for 2x2 / 3x3 matrix types, half float support, etc
CAL::usdmaya::nodes::Layer	The layer node stores a reference to an SdfLayer
CAL::usdmaya::nodes::ProxyShape	A custom proxy shape node that attaches itself to a USD file, and then renders it. The stage is held internally as a member variable, and it will be composed based on a change to the "filePath" attribute
CAL::usdmaya::nodes::Transform	The AL::usdmaya::nodes::Transform node is a custom transform node that allows you to manipulate a USD
CAL::maya::FileTranslatorOptions::FrameLayout::Option
CAL::maya::OptionsParser	Utility class that parses the file translator options passed through by Maya
CAL::maya::Profiler	This class implements a very simple incode profiler. This profiler is NOT thread safe. It is mainly used to get some basic stats on the where the bottlenecks are during a file import/export operation. A simple example of usage:
CAL::maya::ProfilerSectionPath	This class represents a path made up of ProfilerSectionTag's. It is used so that we can distinguish between identical code sections, accessed from alternative paths, e.g
CAL::maya::ProfilerSectionTag	This class provides a static hash that should be unique for a line within a specific function
CAL::usdmaya::cmds::ProxyShapePostLoadProcess	When importing a new usd stage into an AL::usdmaya::nodes::ProxyShape, there are a selection of post import processes that need to take place in order to import any custom usd plugins found
CAL::usdmaya::nodes::SchemaNodeRef	Mapping between a prim path and the transform node under which the prim was imported via a custom plugin translator
CAL::usdmaya::nodes::SchemaNodeRefDB	The proxy shape node needs to store a mapping of all the schema nodes it has brought into the Maya scene. This class holds this mapping
CAL::usdmaya::fileio::SchemaPrimsUtils	Utility class to determine whether a usd transform chain should be created
CAL::usdmaya::StageCache	Maintains a cache of all active stages within maya
▼CTfRefBase
▼CAL::usdmaya::fileio::translators::TranslatorAbstract	The base class interface of all translator plugins. The absolute minimum a translator plugin must implement are the following 3 methods:
▼CAL::usdmaya::fileio::translators::TranslatorBase	Base class for maya translator usd plugins. The TfType of these plugins has to be derived from the base TfType, TranslatorBase
CAL::usdmaya::fileio::translators::TranslatorTestPlugin
CAL::usdmaya::fileio::translators::TranslatorContext	This class provides a context to store mappings between UsdPrims, and the Maya nodes that represent them
▼CTfWeakBase
CAL::usdmaya::fileio::translators::TranslatorAbstract	The base class interface of all translator plugins. The absolute minimum a translator plugin must implement are the following 3 methods:
CAL::usdmaya::nodes::ProxyShape	A custom proxy shape node that attaches itself to a USD file, and then renders it. The stage is held internally as a member variable, and it will be composed based on a change to the "filePath" attribute
CAL::usdmaya::fileio::TransformIterator	An iterator to walk over the transforms within a USD file
CAL::usdmaya::fileio::translators::TranslatorManufacture	Forms a registry of all plug-in translator types registered
▼CUsdTyped
CAL::usdmaya::fileio::translators::TranslatorTestType
CAL::usdmaya::nodes::SchemaNodeRefDB::value_compare	Comparison utility (for sorting array of pointers to node references based on their path)