Using XML with Legacy Business Applications

Schemas for Source and Target Documents

How We'll Use Schemas

Schemas for the source and target XML representations of our legacy formats play an important but optional role in this approach. We decided that we'll use our own XML-based languages for describing the grammars of our non-XML formats. In addition, we decided that our utilities, in and of themselves, are not going to perform full validation against business constraints when converting but will perform only the validation necessary for converting our non-XML formats to and from XML. So, what role do schemas play in the architecture?

Schemas play an important role by providing the primary means by which business constraints are enforced. We will validate our XML formats against schemas ...