• ConnectionRAII : knowrob::MongoKnowledgeGraph
• DependencyGraph : knowrob::DependencyNode
• GraphQuery : knowrob::GraphTerm
• ImportHierarchy : knowrob::CurrentGraph
• PrologList : knowrob::PrologTerm
• QueryPipeline : knowrob::QueryStage
• QueryTree : knowrob::QueryTree::Path
• ReasonerManager : knowrob::Reasoner
• StorageManager : knowrob::Storage
• ThreadPool : knowrob::ThreadPool::Runner , knowrob::ThreadPool::Worker
• ThreadPool::Worker : knowrob::ThreadPool::Runner
• TokenStream : knowrob::TokenStream::Channel