The existence of huge data volume on the Web has fueled an unrelenting need to locate "right information at right time," as well as to effectively develop an integrated, comprehensive information source. This calls for tools for efficiently analyzing and managing web data-and for efficiently managing web information from the database perspective.

This comprehensive resource presents a data model called WHOM (WareHouse Object Model) to represent HTML and XML documents in the warehouse. The book defines a set of web-algebraic operators for building new web tables by extracting relevant data from the Web, as well as generating new tables from existing ones. Its "web-warehouse approach" incorporates modern and effective shared web data-management concepts, methods, and models.

Features & Benefits:

*Presents a simple and generic data model for representing metadata, structure, and content of Web documents and hyperlinks

*Addresses schema-related issues for both HTML and XML data, with their associated challenges of irregularity and heterogeneity

*Describes a web algebra for manipulating warehoused data

*Utilizes numerous examples to illustrate various concepts of web data management and to simplify all key issues for readers

*Highlights change management and knowledge discovery, two important applications of a web warehouse

With its accessible style and emphasis on practicality, the book delivers an excellent survey of all current principles for structured, web-based data management technologies. Database management systems developers, enterprise website developers, and applied R&D researchers will find the work an essential companion for new concepts, development strategies, and application models.

Key Topics:

Node and link objects

Comparison predicates

Connectivities

Coupling-query formulation

Web schema

WHOM (WareHouse Object Model)

Schema generation and pruning

Data visualization

Web deltas & web bags

Knowledge-discovery applications

-- Databases / Information Systems

-- Beginning / Intermediate

Klappentext

Existence of huge amounts of data on the Web has developed an undeferring need to locate right information at right time, as well as to integrating information effectively to provide a comprehensive source of relevant information. There is a need to develop efficient tools for analyzing and managing Web data, and efficiently managing Web information from the database perspective. The book proposes a data model called WHOM (Warehouse Object Model) to represent HTML and XML documents in the warehouse. It defines a set of web algebraic operators for building new web tables by extracting relevant data from the Web, as well as generating new tables from existing ones. These algebraic operators are used for change detection.

Inhalt

• Introduction * Survey of Web data-management systems * Node and link objects * Predicate on node and link objects * Imposing constraints on hyperlink structure * Query mechanism for the Web * Schemas for warehouse data * WHOM-algebra * Applications of Web warehouses * Concluding remarks * Index