Inlämning av Examensarbete / Submission of Thesis

Gordana Maksimovic , pp. 30. Inst. för programvaruteknik och datavetenskap/Dept. of Software Engineering and Computer Science, 2003.

The work

Författare / Author: Gordana Maksimovic
Titel / Title: Query Languages for Semi-structured Data
Abstrakt Abstract:

Semi-structured data is defined as irregular data with structure that may change rapidly or unpredictably. An example of such data can be found inside the World-Wide Web. Since the data is irregular, the user may not know the complete structure of the database. Thus, querying such data becomes a difficult issue. In order to write meaningful queries on semi-structured data, there is a need for a query language that will support the features that are presented by this data. Standard query languages, such as SQL for relational databases and OQL for object databases, are too constraining for querying semi-structured data, because they require data to conform to a fixed schema before any data is stored into the database. This paper introduces Lorel, a query language developed particularly for querying semi-structured data. Furthermore, it investigates if the standardised query languages support any of the criteria presented for semi-structured data. The result is an evaluation of three query languages, SQL, OQL and Lorel against these criteria.

Ämnesord / Subject: Datavetenskap - Computer Science\General

Nyckelord / Keywords: Semi-structured data, unstructured data, data on the Web, database management, Lorel

Publication info

Dokument id / Document id:
Program:/ Programme Internationell ADB/International IS
Registreringsdatum / Date of registration: 09/16/2004
Uppsatstyp / Type of thesis: C-Uppsats


Handledare / Supervisor: Miroslaw Staron
Examinator / Examiner: Guohua Bai
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: Inst. för programvaruteknik och datavetenskap/Dept. of Software Engineering and Computer Science
Inst. för Programvaruteknik och Datavetenskap S-372 25 Ronneby
+46 455 38 50 00

Files & Access

Bifogad uppsats fil(er) / Files attached: bcthgordanam.pdf (645 kB, öppnas i nytt fönster)