Appendix A
The Codasyl (network) model provides a contrast to the relational model. The
appendix is divided into three parts:
A1: Basics of the Codasyl (network) model
A2: Further Codasyl schema facilities
A3: Further Codasyl DML facilities
A product of CODASYL is not the property of any individual, company, or
organisation or of any group of individuals, companies or organisations.
No warranty, expressed or implied, is made by any contributor or by any CODASYL
committee as to the accuracy and functioning of any system developed as a result of this
Moreover, no responsibility is assumed by any contributor or by any committee in
connection therewith.
This product neither states the opinion of, nor implies concurrence of, the sponsoring

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