Towards a temporal World-Wide Web: a transaction-time server
Towards a temporal World-Wide Web: a transaction-time server
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迈向临时万维网：事务时间服务器
DOI：
10.1109/adc.2001.904480
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
Curtis E. Dyreson
中科院分区：
文献类型：
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作者：
Curtis E. Dyreson
事务时间是数据库事务的时间，即插入、更新或删除。事务时间数据库存储数据库的事务时间历史，并支持检索过去数据库状态的事务时间片查询。本文介绍了万维网的交易时间。在Web上下文中，事务时间是资源（如XML文档）的修改时间。事务时Web服务器存档资源版本并支持事务时片。与数据库服务器不同，Web服务器通常不参与资源的更新，而是仅在请求资源时才活动。本文描述了一个延迟更新协议，该协议使Web服务器能够在资源读取期间管理资源版本。我们的方法的一个重要好处是，事务时间可以通过透明的、最小的Web服务器扩展来支持；不需要更改遗留资源、HTTP、XML或HTML。此外，Web服务器可以在任何时候无缝地成为事务时服务器，而不会影响或修改它所服务的资源或其他Web服务器。
Transaction time is the time of a database transaction, i.e., an insertion, update, or deletion. A transaction time database stores the transaction-time history of a database and supports transaction timeslice queries that retrieve past database states. The paper introduces transaction time to the World-Wide Web. In a Web context, transaction time is the modification time of a resource such as an XML document. A transaction-time Web server archives resource versions and supports transaction timeslice. Unlike a database server, a Web server is typically uninvolved in the update of a resource, instead it is only active when a resource is requested. The paper describes a lazy update protocol that enables a Web server to manage resource versions during resource reads. An important benefit of our approach is that transaction-time can be supported by a transparent, minimal Web server extension; no changes to legacy resources, HTTP, XML, or HTML are required. Furthermore, a Web server can seemlessly become a transaction-time server at any time without affecting or modifying the resources it services or other Web servers.