This package contains the compiler driver (CompilerAPI), the source management subsystems (CompilerSwcContext, FileSpec, ResourceContainer, SourceList, SourcePath), common base classes/interfaces (AbstractDelegatingSubCompiler, AbstractSubCompiler, ILocalizableMessage, Logger, PreLink, SubCompiler, Transcoder), and the data structures used throughout a Flex compilation (Assets, CompilationUnit, CompilerContext, Source, and SymbolTable).