Because of the rapid development of internet , the problem of information overloading becomes very serious . people need some efficient ways to get exactly what they need from the various unstructured or semi - structured data 由于互联网的飞速发展,信息过载( informationoverload )的问题越来越严重,人们需要各种方法来快速地从大量不规则分布的数据中找到自己所需要的。
Integration services - provides management support for integration services package storage and execution . full - text search - quickly creates full - text indexes on content and properties of structured and semi - structured data to allow fast linguistic searches on this data 本主题的其余部分提供的信息有助于了解默认行为,还有助于为您安装的sql server配置sql server服务帐户:
In study of xml data model , we investigate the semi - structure charasteristics of xml : selfdescribe , graph - based model and irregular then the compedson and analysis of normal tree - structure model and node labeled direct graph are presented 对xml的数据模型,我们研究了xml的半结构化特性:自描述、图结构和不规则。然后对比分析了xml常见的树结构模型和图结构模型对xml查询基本操作的影响。
At the same time , a large amount of heterogeneous and semi - structured multimedia teaching resources disseminated on the network restrict the information expression , exchange and sharing in semantic heterogeneous environment 与此同时,海量的散布在网络上的非结构化或半结构化的异种多媒体教学资源限制了语义异构环境下的信息表示、交换、共享和智能化的应用,因此,迫切需要扩展现有的数据表示机制。
When storing xml document in relation database , it needs to split the semi - structured xml into rows and columns of relations . it is time consume and breaks the original structure of xml document . so it reduce the speed of data processing 当xml数据存储到关系数据库时,需要将树状结构的xml文档映射成平面的行和列,这样不仅增加了转换的时间,而且破坏了文档本身的结构,从而降低了数据处理的速度。