它们还可以存储结构化类型的列或索引数据。
一个目录型网站需要一个名称的字顺列表来查找，但该列表不是一个结构化的、主题化的索引（如前所述）。
A directory-type site might require an alphabetical list of names to look up, but this would not be a structured, topical index (as explained above).
不管使用什么技术，索引大量非结构化数据是一件很艰难的任务。
Indexing large amounts of unstructured data is a difficult task regardless of the technologies involved.
我所能获取的列太多，又很容易遗漏重要的结构化数据库特性，比如索引或空约束。
I can fetch too many columns, or leave off important structural database features, like indexes or null constraints.
对于DB 2索引扩展要注意的一点是对用户定义类型的需求—distinct类型或结构化类型。
One thing to be aware of regarding DB2 index extensions is the requirement for user-defined types - either distinct types or structured types.
索引扩展(与用户定义的结构化类型相关)。
它取代了2004开始试探的最初索引算法，它已经证明在处理大量和非结构化数据集时更有效。
It replaced the original indexing algorithms and heuristics in 2004, given its proven efficiency in processing very large, unstructured datasets.
文档模型在一个文件中定义，它们指定对结构化文档(例如xml格式的文档)进行解析和建立索引的模型。
The document model, defined in a file, specifies a model for parsing and indexing structured documents of format XML, for example.
许多应用，尤其是搜索引擎，可以极大低受益于直接访问这种结构化数据。
Many applications, especially search engines, can benefit greatly from direct access to this structured data.
通过向新闻网页中添加这些结构化的和约定好的代码，搜索引擎可以更好的识别新闻的内容，爱看新闻的人就可以通过时间，日期或是作者等关键字来搜索过滤新闻了。
By adding these structured and agreed-upon codes to the underside of online news pages, search engines can make more sense of the stories and news junkies can search for news by time, date or author.
对索引的查询将使用标准结构化查询语言（Structured Query Language，SQL）来执行。
The query on the index would have been performed using standard Structured Query Language (SQL).
基于算法的搜索：最好的例子就是Google的“PageRank”算法，使得GOogle的搜索引擎具有非常强大的能力，具备扩展性索引庞大的非结构化数据的能力。
Algorithmic-based search. This is best exemplified by Google's automated "page rank" popularity engine that has tremendous power and scale to index vast amounts of unstructured data.
互联网的搜索引擎们把主要精力都放在采集web页面的文本信息上，但是google却在研究如何分析和组织结构化数据方面小有所成，该公司的一位科学家上周五表示。
Internet search engines have focused largely on crawling text on Web pages, but Google is knee-deep in research about how to analyze and organize structured data, a company scientist said Friday.
针对结构化连接，设计新的四元组索引结构。
It proposes the four-tuple index structure on which the structural join based.
在分词技术、索引技术、结构化查询语言技术的基础上，提出了一个基于XML文档数据库的信息检索系统，这一系统模型主要由分词模块、索引模块及查询模块组成。
This paper puts forward an information retrieval system based on XML documents database on the foundation of segmentation technology, index technology and structured query language technology.
对博硕士论文数据集的XML标引、索引、关键词检索和结构化检索分别进行设计和实现，构建一个基于XML的中文博硕士论文检索系统。
It designs and implements XML tagging, indexing, keyword retrieval and structural retrieval on Chinese thesis, and finally constructs an XML-based Chinese thesis retrieval system.
根据包含以上两个索引的结构化河网，提供了若干检索函数，作为地图数据库中结构处理时结构信息的提取手段。
Finally, based on the structured river network which contains these two indices, several retrieval functions are provided as a way to extract structural information during the STR...
根据包含以上两个索引的结构化河网，提供了若干检索函数，作为地图数据库中结构处理时结构信息的提取手段。
Finally, based on the structured river network which contains these two indices, several retrieval functions are provided as a way to extract structural information during the structure pr...
如果索引服务器出现故障，系统会自动转换成全分布式非结构化拓扑结构，大大提高了系统的可靠性。
If the index server fails, the system will automatically convert to the fully distributed unstructured topology. This greatly enhanced the reliability of the system.
全文检索是现代信息检索技术的一个非常重要的分支，它是处理非结构化数据的强大工具，也是搜索引擎的核心技术之一。
Full-text retrieval is an important information retrieval technology. It is a powerful tool for dealing with nonstructural data, and is one of the key technologies of the search engine.
原型采用半结构化表示方法来表征案例，同时从主题和情境两个纬度组织和索引案例。
The prototype uses the semi-structured method to represent case knowledge, which is organized and indexed in subject and context dimensions.
但它在结构化数据信息的获取方面，还不能满足垂直搜索引擎的需要。
But in structurized data information gain aspect, it's not been able to meet the Vertical Search Engine's needs.
Oracle9i增加了互联网查找，从丰富内容中抽取和索引元数据的强大工具，以及查找XML数据和编目结构化数据的能力。
Oracle9i adds Internet search, powerful facilities to extract and index metadata from rich content, and the ability to search XML and catalog structures.
Oracle9i增加了互联网查找，从丰富内容中抽取和索引元数据的强大工具，以及查找XML数据和编目结构化数据的能力。
Oracle9i adds Internet search, powerful facilities to extract and index metadata from rich content, and the ability to search XML and catalog structures.
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