XPath - based Concurrency Control in XML Document Management

• Item type: Trans(1)
• 公開日: 2003-12-15
• タイトル: XPath - based Concurrency Control in XML Document Management
• タイトル / 言語: en
• タイトル: XPath - based Concurrency Control in XML Document Management
• 言語: eng
• キーワード / 主題Scheme: Other
• キーワード / 主題: 研究論文
• 資源タイプ / 資源タイプ識別子: http://purl.org/coar/resource_type/c_6501
• 資源タイプ: journal article
• 著者所属: Corporate Research & Development Center Toshiba Corporation
• 著者所属(英): en
• 著者所属(英): Corporate Research & Development Center, Toshiba Corporation
• 著者名: EunHyeChoi; Tatsunori, Kanai
• 著者名(英): Eun, HyeChoi; Tatsunori, Kanai
• 論文抄録 / 内容記述タイプ: Other
• 論文抄録 / 内容記述: Although concurrency control has been recognized as an important issue in XML data management there are still few previous works that provide the concurrency of transactions retrieving and modifying the same XML documents. To overcome this problem we propose a new XPath-based concurrency control scheme called XPCC that guarantees high concurrency and serializability of concurrent transactions to the same XML document. The proposed approach considers unrestricted XML documents and general XPath query and the key ideas of XPCC are as follows: (1) semantic locks are set on XPath expressions used in transaction accesses and (2) two versions of an XML document a version containing updates of each transaction and a version containing updates of all concurrent transactions are utilized for conflict checks. In XPCC at the time that each transaction access is requested the conflict to violate serializability is detected based on the equivalence check for results of XPath evaluation against two versions of documents. Since the proposed approach enables locking to be at the level of precise data actually retrieved and updated in XML documents high concurrency can be achieved assuring serializability in XML data management.
• 論文抄録(英) / 内容記述タイプ: Other
• 論文抄録(英) / 内容記述: Although concurrency control has been recognized as an important issue in XML data management, there are still few previous works that provide the concurrency of transactions retrieving and modifying the same XML documents. To overcome this problem, we propose a new XPath-based concurrency control scheme, called XPCC, that guarantees high concurrency and serializability of concurrent transactions to the same XML document. The proposed approach considers unrestricted XML documents and general XPath query, and the key ideas of XPCC are as follows: (1) semantic locks are set on XPath expressions used in transaction accesses, and (2) two versions of an XML document, a version containing updates of each transaction and a version containing updates of all concurrent transactions, are utilized for conflict checks. In XPCC, at the time that each transaction access is requested, the conflict to violate serializability is detected based on the equivalence check for results of XPath evaluation against two versions of documents. Since the proposed approach enables locking to be at the level of precise data actually retrieved and updated in XML documents, high concurrency can be achieved assuring serializability in XML data management.
• 書誌レコードID / 収録物識別子タイプ: NCID
• 書誌レコードID / 収録物識別子: AA11464847
• 書誌情報: 情報処理学会論文誌データベース（TOD）; 巻 44, 号 SIG18(TOD20), p. 17-31, 発行日 2003-12-15
• ISSN / 収録物識別子タイプ: ISSN
• ISSN / 収録物識別子: 1882-7799
• 出版者 / 言語: ja
• 出版者: 情報処理学会