DepthFirst sorts a map of anything.

KeyParts construct a SplitKey with all its /-separated segments decomposed.

ReverseIndex builds a reverse index for references in schemas.

TopmostFirst sorts references by depth.

Key represent a key item constructed from /-separated segments.

RefRevIdx is a reverse index for references.

Keys is a sortable collable collection of Keys.

PartAdder know how to construct the components of a new name.

SplitKey holds of the parts of a /-separated key, so that their location may be determined.