The art of computer programming, volume 1 (3rd ed.): fundamental algorithms
The art of computer programming, volume 1 (3rd ed.): fundamental algorithms
Joe Celko's SQL for Smarties: Advanced SQL Programming
Joe Celko's SQL for Smarties: Advanced SQL Programming
A unified platform for archival description and access
Proceedings of the 7th ACM/IEEE-CS joint conference on Digital libraries
Access and Exchange of Hierarchically Structured Resources on the Web with the NESTOR Framework
WI-IAT '09 Proceedings of the 2009 IEEE/WIC/ACM International Joint Conference on Web Intelligence and Intelligent Agent Technology - Volume 01
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In this paper we study the problem of representing, managing and exchanging hierarchically structured data in the context of a Digital Library (DL). We present the NEsted SeTs for Object hieRarchies (NESTOR) framework defining two set data models that we call: the "Nested Set Model (NS-M)" and the "Inverse Nested Set Model (INSM)" based on the organization of nested sets which enable the representation of hierarchical data structures. We present the mapping between the tree data structure to NS-M and to INS-M. Furthermore, we shall show how these set data models can be used in conjunction with Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) adding new functionalities to the protocol without any change to its basic functioning. At the end we shall present how the couple OAI-PMH and the set data models can be used to represent and exchange archival metadata in a distributed environment.