A data definition and mapping language
Communications of the ACM
An approach to Stored Data Definition and Translation
SIGFIDET '72 Proceedings of 1972 ACM-SIGFIDET workshop on Data description, access and control
A developmental model for data translation
SIGFIDET '72 Proceedings of 1972 ACM-SIGFIDET workshop on Data description, access and control
A method for data translation using the Stored-Data Definition and Translation Task Group languages
SIGFIDET '72 Proceedings of 1972 ACM-SIGFIDET workshop on Data description, access and control
ACM Transactions on Database Systems (TODS)
Conversion technology, an assessment
ACM SIGMIS Database
A unified approach to program and data conversion
VLDB '77 Proceedings of the third international conference on Very large data bases - Volume 3
Database program conversion: a framework for research
VLDB '79 Proceedings of the fifth international conference on Very Large Data Bases - Volume 5
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Hierarchical structures are widely used in information processing. An application program written to traverse a hierarchical structure will not work properly, if at all, when the order of the structure (in the sense of tree order) is altered. This paper presents a method in the context of IMS systems to intercept and interpret data base manipulation commands issued by the application program to eliminate the necessity of reprogramming when a hierarchical structure is subject to an order transformation. Algorithms involving command substitution rules for various situations have been derived to insure the correct execution of application programs irrespective of the order of the structure.