A relational database has a data file stored separately from a representation of the schema of the relational data in the data file. Schema representation files of several different types are generated by compiling a human-readable script defining the schema. One of the schema files is linked to its...http://www.google.fr/patents/US6839715?utm_source=gb-gplus-shareBrevet US6839715 - Installable schema for low-overhead databases
