A Multimedia display extension to SQL Language and Design Architecture.pdf

下载文档

3
0
约5.2万字
约 23页
2017-04-13 发布于江苏
举报
版权申诉
保障服务

A Multimedia display extension to SQL Language and Design Architecture.pdf

1、本文档共23页，可阅读全部内容。
2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。

A Multimedia display extension to SQL Language and Design Architecture

A Multimedia display extension to SQL: Language Design andArchitectureChitta Baral, Graciela Gonzalez and Tran SonDepartment of Computer ScienceUniversity of Texas at El PasoEl Paso, Texas 79968U.S.A.fchitta,chelis,tsong@March 8, 1997AbstractWe propose here a loosely-bound SQL extension that will allow users to include high-leveldisplay specications with an SQL query, particularly when dealing with multimedia databases.This way, the user can specify both the data that needs to be extracted and how it should bedisplayed. We also describe an architecture that will allow a relatively simple implementationof dynamic query browsers using the proposed query language on stand-alone applications orWeb pages. We have implemented a major subset of our proposed extension and are workingon a complete prototype.1 IntroductionAt the time when the concept of a \database came into being, nobody imagined the extent andvariety of data that will eventually be stored in such structures. To display data as columns androws of text is no longer sucient these days. Multimedia databases, with their rich content ofimages, audio, video and animations, demand much more.Multimedia information is not necessarily stored using a dierent data model. Relational databasesare often used to store pointers (lenames) of the multimedia data. However, if the user tries touse a traditional query interface or a query language such as SQL, answers to queries made tomultimedia databases are displayed in the same \spreadsheet style as normal data queries, or, atbest, as a list of navigatable links to the real elements that make up the answer. For anythingbeyond that, the user has to rely on a programmer to write a graphical interface in C, PowerBuilder, Visual Basic, C++ or any other programming language.The design of special graphical interfaces becomes more dicult if we wish to access databases anddynamically display data over the Web. This has been a subject of research for some time now[NS96, Ra94]. Ac