Schema Conversion from Relation to XML with Semantic Constraints

This paper studies the schema conversion from relational schemas to XML DTDs. As functional dependencies play an important role in schema conversion process, the concept of functional dependency for XML DTDs is proposed to preserve the semantics implied by functional dependencies and keys of relational schemas. A conversion method called NeT-FD (nesting- based translation with functional dependencies) is proposed to convert relational schemas to XML DTDs in the presence of functional dependencies and keys. The method presented here can preserve the semantics implied by functional dependencies and keys of relational schemas and can convert multiple tables to XML DTDs at the same time.