BTree  
BTreeIterator  
BTreeNode  
BigInt  BigInt  arbitrary precision integer via the gnu gmp library

Data  Refcounted Persistent Objects under the coldstore virtual protocol

Integer  Pool allocated 32 bit signed integers

List  dynamic ordinally indexed array of @see Slot

NList  dynamic ordinally indexed 2dimensional ntuples of @see Slot

PathStruct  
Real  Real  arbitrary precision floats via the gnu gmp library

Segment  Segment<T> templated class for weak @see Vector

Slot  Slot class  a smart pointer to Data
which provides for copyonwrite of the Data it manages

String  Dynamic shared String

UString  caseless String

Vector  Templated Vector class
A Vector is a pair of Segments, one (Vector's parent) delineates
the active subrange of the second, (called allocation)
allocation is a TupleBase array allocated by QVMM, it encloses the active subrange

tSlot  