Schema Evolution publication categorizer

In this chapter, three semantics-based schema conversion methods are presented:
1) CPI converts an XML schema to a relational schema while preserving semantic
constraints of the original XML schema, 2) NeT derives a nested structured
XML schema from a flat relational schema by repeatedly applying the nest operator
so that the resulting XML schema becomes hierarchical, and 3) CoT takes a relational
schema as input, where multiple tables are interconnected through inclusion dependencies
and generates an equivalent XML schema as output.