Restructuring for large databases: three levels of abstraction
ACM Transactions on Database Systems (TODS)
CONVERT: a high level translation definition language for data conversion
Communications of the ACM
Implementation of a prototype generalized file translator
SIGMOD '75 Proceedings of the 1975 ACM SIGMOD international conference on Management of data
A logical-level approach to data base conversion
SIGMOD '75 Proceedings of the 1975 ACM SIGMOD international conference on Management of data
A developmental model for data translation
SIGFIDET '72 Proceedings of 1972 ACM-SIGFIDET workshop on Data description, access and control
Architecture to an interactive migration system (AIMS)
SIGFIDET '74 Proceedings of the 1974 ACM SIGFIDET (now SIGMOD) workshop on Data description, access and control
A data description language approach to file translation
SIGFIDET '74 Proceedings of the 1974 ACM SIGFIDET (now SIGMOD) workshop on Data description, access and control
Diet: A data independent system for medical applications
ACM '77 Proceedings of the 1977 annual conference
Conversion technology, an assessment
ACM SIGMIS Database
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The Access Path Specification Language (APSL) is a high-level essentially nonprocedural language for specifying restructuring transformations of network databases. It does so in terms of application-oriented concepts such as access strategies and selection criteria. APSL's approach to restructuring emphasizes description of the source structures from which target data is to be retrieved, rather than the operations needed to convert source constructs to target constructs. The latter approach is used by most current systems to restructure hierarchical data.APSL is based on the Relational Interface Model (RIM) of data, which permits a suitably restricted network database to be viewed simultaneously as a relational database in first normal form. Any restructuring of a RIM database which can be performed by the relational algebra operations Join, Select, Project, and Union can be described in APSL.APSL has been implemented as the restructuring specifications language in the Michigan Data Translator.