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

[detail level 12]

EnumBase
openstudio::IddFieldType	Enumeration of IDF field types as defined by the possible values for the IDD \type flag
openstudio::ExtensibleIndex	Index pair for IdfObject fields in extensible groups
openstudio::IddField	IddField represents a field in an IddObject, that is, the schema for a single piece of data (alpha or numeric) in an IDF
openstudio::IddFieldProperties	IddFieldProperties describes the properties of an IddField object, as specified by IDD markup
openstudio::IddFile	IddFile provides parsing and printing of text files in Input Data Definition (IDD) format
openstudio::IddFileAndFactoryWrapper	Wraps the functionality of IddFile and IddFactory into one class for use by IdfFile and Workspace
openstudio::IddKey	IddKey represents an enumeration value for an IDD field of type choice
openstudio::IddKeyProperties	IddKeyProperties is an all public class describing the properties of an IddKey object
openstudio::IddObject	IddObject represents an object in the Idd
openstudio::IddObjectProperties	IddObjectProperties describes the properties of an IddObject, as specified by object-level IDD markup