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Journal ArticleDOI

Lore: a database management system for semistructured data

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TLDR
This paper provides an overview of these aspects of the Lore system, as well as other novel features such as dynamic structural summaries and seamless access to data from external sources.
Abstract
Lore (for Lightweight Object Repository) is a DBMS designed specifically for managing semistructured information. Implementing Lore has required rethinking all aspects of a DBMS, including storage management, indexing, query processing and optimization, and user interfaces. This paper provides an overview of these aspects of the Lore system, as well as other novel features such as dynamic structural summaries and seamless access to data from external sources.

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Citations
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Proceedings Article

Deferred incremental refresh of XML materialized views: algorithms and performance evaluation

TL;DR: The algorithms for checking a update's relevance to views and for generating the operations and data necessary for view refresh are proposed and the experimental results show that the proposed scheme outperforms recomputation of XML views.
Journal Article

A Clustering Method Based on Path Similarities of XML Data

TL;DR: The results show that the performance of XML storage can be improved by using a proper clustering technique, and existing clustering techniques used to store XML data are applied.
Book ChapterDOI

Index Selection for Efficient XML Path Expression Processing

TL;DR: A cost model for the space consumption of indexes and their benefit to XML queries is presented and it is demonstrated that query performance gets comparatively significant improvement over the case without indexes while only consuming disk space of modest size.
Journal ArticleDOI

Lightweight multigranularity locking for transaction management in XML database systems

TL;DR: This work has devised a new data model of XML indexed element tables (XIETs) for transferring diverse XML documents that does not only can preserve the XML tree structure in application levels, but also enables execution of the structural change operations as well as the data access operations in parallel.
Journal ArticleDOI

Efficient indexing technique for XML-based electronic product catalogs

TL;DR: This paper presents an indexing structure for processing queries efficiently on natively stored XML-based electronic product catalogs, and presents the performance comparison of the index structure with two alternative approaches.
References
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Journal ArticleDOI

Federated database systems for managing distributed, heterogeneous, and autonomous databases

TL;DR: In this paper, the authors define a reference architecture for distributed database management systems from system and schema viewpoints and show how various FDBS architectures can be developed, and define a methodology for developing one of the popular architectures of an FDBS.
Journal ArticleDOI

Query evaluation techniques for large databases

TL;DR: This survey describes a wide array of practical query evaluation techniques for both relational and postrelational database systems, including iterative execution of complex query evaluation plans, the duality of sort- and hash-based set-matching algorithms, types of parallel query execution and their implementation, and special operators for emerging database application domains.
Proceedings Article

DataGuides: Enabling Query Formulation and Optimization in Semistructured Databases

TL;DR: The theoretical foundations of DataGuides are presented along with an algorithm for their creation and an overview of incremental maintenance, and performance results based on the implementation of dataGuides in the Lore DBMS for semistructured data are provided.
Journal ArticleDOI

The Lorel Query Language for Semistructured Data

TL;DR: The main novelties of the Lorel language are the extensive use of coercion to relieve the user from the strict typing of OQL, which is inappropriate for semistructured data; and powerful path expressions, which permit a flexible form of declarative navigational access and are particularly suitable when the details of the structure are not known to the user.
Book

The object database standard: ODMG 2.0

TL;DR: With this book, standards are defined for object management systems and this will be the foundational book for object-oriented database product.
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