新书推介:《语义网技术体系》
作者:瞿裕忠,胡伟,程龚
随时掌握技术动态,请订阅:
《Web技术日报》
《机器学习日报》
   XML论坛     >>W3CHINA.ORG讨论区<<     计算机科学论坛     SOAChina论坛     Blog     开放翻译计划     新浪微博  
 
  • 首页
  • 登录
  • 注册
  • 软件下载
  • 资料下载
  • 核心成员
  • 帮助
  •   Add to Google

    >> 最新的技术动态
    [返回] W3CHINA.ORG讨论区 - 语义网·描述逻辑·本体·RDF·OWL休息区『 最新动态 & 业界新闻 』 → 读写网采访Tim Berners-Lee第一部分:Linked Data 查看新帖用户列表

      发表一个新主题  发表一个新投票  回复主题  (订阅本版) 您是本帖的第 14496 个阅读者浏览上一篇主题  刷新本主题   树形显示贴子 浏览下一篇主题
     * 贴子主题: 读写网采访Tim Berners-Lee第一部分:Linked Data 举报  打印  推荐  IE收藏夹 
       本主题类别: Ontology Language | RDF/RDFS    
     admin 帅哥哟,离线,有人找我吗?
      
      
      
      威望:9
      头衔:W3China站长
      等级:计算机硕士学位(管理员)
      文章:5255
      积分:18396
      门派:W3CHINA.ORG
      注册:2003-10-5

    姓名:(无权查看)
    城市:(无权查看)
    院校:(无权查看)
    兴趣:
    * XML相关技术
    * 资料收集
    * Ontology Engineering
    * Web架构
    * SW Implementation
    给admin发送一个短消息 把admin加入好友 查看admin的个人资料 搜索admin在『 最新动态 & 业界新闻 』的所有贴子 点击这里发送电邮给admin  访问admin的主页 引用回复这个贴子 回复这个贴子 查看admin的博客楼主
    发贴心情 读写网采访Tim Berners-Lee第一部分:Linked Data

    ReadWriteWeb Interview With Tim Berners-Lee, Part 1: Linked Data
    Written by Richard MacManus / July 8, 2009 6:00 AM

    按此在新窗口浏览图片

    During my recent trip to Boston, I had the opportunity to visit MIT. At the end of a long day of meetings with various MIT tech masterminds, I made my way to the funny shaped building (see photo right-below) where the World Wide Web Consortium (W3C) and its director Tim Berners-Lee work.

    Berners-Lee is of course the man who invented the World Wide Web 20 years ago.

    This was my first meeting with the Web's creator, whose work and philosophy was a direct inspiration for me when I launched ReadWriteWeb back in 2003.1

    按此在新窗口浏览图片After shaking hands, I told Tim Berners-Lee that this blog's name was in part inspired by the first browser, which he developed, called "WorldWideWeb". That was a read/write browser; meaning you could not only browse and read content, but create and edit content too. It was a shame then when Mosaic, a read-only browser, became the first mainstream web browser in the mid-90s. It wasn't until the rise of Web 2.0 that the read/write philosophy gained widespread acceptance.2 On that note, we launched into the interview...

    Note: the interview will be published in two parts, with Part 1 today on the topic of Linked Data. Part 2 will explore other topics and will run tomorrow.

    [B]UPDATE: [URL=http://www.readwriteweb.com/archives/readwriteweb_interview_with_tim_berners-lee_part_2.php]Part 2 of this interview[/URL][/B] is now available.
    How Linked Data Relates to The Semantic Web

    RWW: Earlier this year you gave [URL=http://www.readwriteweb.com/archives/linked_data_is_blooming_why_you_should_care.php]an inspiring talk at TED about Linked Data[/URL]. You described Linked Data as a sea change akin to the invention of the WWW itself - i.e. we've gone from a Web of documents to a Web of data. Can you please explain though how Linked Data relates to the Semantic Web, is it a subset of it?

    TBL: They fit in completely, in that the linked data actually uses a small slice of all the various technologies that people have put together and standardized for the Semantic Web.

    Linked Data uses a small slice of the technologies that make up the Semantic Web.

    We started off with the Semantic Web roadmap, which had lots of languages that we wanted to create. [However] the community as a whole got a bit distracted from the idea that actually the most important piece is the interoperability of the data. The fact that things are identified with URIs is the key thing.

    The Semantic Web and Linked Data connect because when we've got this web of linked data, there are already lots of technologies which exist to do fancy things with it. But it's time now to concentrate on getting the web of linked data out there.

    按此在新窗口浏览图片
    Web inventor Tim Berners-Lee and ReadWriteWeb founder Richard MacManus
    How Linked Data Has Evolved via Grassroots

    RWW: Linked Data has had a lot of grassroots support, which you mentioned in your TED speech. This is something Semantic Web technologies, such as RDF, have struggled to get over the years. Has the W3C been pushing the more bottom-up Linked Data world, because of the frustration over [URL=http://www.readwriteweb.com/archives/rdf_semantic_web_apps.php]lack of take-up of top-down Semantic Web[/URL]?

    TBL: A lot of the initial RDF and OWL projects came out of the academic world; and some of them were projects to show what you could do in a closed world. And the files were zipped up and left on a disc. While they were interesting projects, and while the systems were useful systems, the semantic web community maybe missed the point of the 'web' bit and focused too much on the 'semantic'. However the work that's been done in the Semantic Web, the standards, was really valuable. It's relatively recently for example that [URL=http://www.w3.org/TR/rdf-sparql-query/]SPARQL[/URL] [an RDF query language] has been developed.

    "It's time now to concentrate on getting the web of linked data out there."

    Somebody drew an analogy the other day: can you imagine trying to promote a world of databases without SQL? Even though it's not an interoperable protocol, it's just a query language. So similarly, all that's been put into RDF, rdfs and OWL is very valuable to the linked data community.

    The Linked Data community tend to use a subset of that [Semantic Web technologies], of OWL for example. But they certainly use SPARQL. So you could argue that really it wasn't ready to be deployed widely.

    Linked Data started as a very informal [URL=http://www.w3.org/DesignIssues/LinkedData.html]Design Issues note[/URL] that I put in; it was a grassroots movement from very early on. So yes W3C has been emphasizing the importance of Linked Data. It's been the [URL=http://www.w3.org/2001/sw/interest/]Semantic Web Interest Group[/URL] of course, and various [other Semantic Web] activities, which has been pushing it. But also Linked Data has been seized on - a group of people for example put together [URL=http://dbpedia.org/]DBpedia[/URL].3 That wasn't commissioned, that was that they just thought it would be a really cool idea.

    按此在新窗口浏览图片
    Graph of Linked Data sets on the Web, as at March 2009
    Linked Data and Governments

    RWW: In [URL=http://www.w3.org/DesignIssues/GovData.html]a recent Design Issues note[/URL], you urge [URL=http://www.readwriteweb.com/archives/open_goverment_berners-lee_and_the_uk_to_show_obam.php]governments to put their data online[/URL] as Linked Data (although you'd also be happy for governments to just make available the raw data - presumably so that others can then structure it). What do you realistically expect, for example, the U.S. or U.K. governments to do over the next year? And in the near future, do you foresee different governments interconnecting their Linked Data sets?

    TBL: One can't generalize, governments are (like most big organizations) fascinatingly diverse inside them. So you'll find that there are places inside governments where you get a champion who gets linked data and who's just written a script and produced some linked data. So in the UK government for example, you'll find there's RDFa [in the code of its website] for civil service jobs. So if somebody wants to make a database of all the jobs, they can do that very easily.

    "The first step of actually putting the data out there is the one that nobody else can do."

    There are other cases where the easiest thing for somebody to do is to just put data up in whatever form it's available. Comma separated values (CSV) files are remarkably popular. They're exported sometimes from spreadsheets. It's remarkable how much information is in spreadsheets. Or sometimes pulled out of a database and then put up on the web. It's not as good, not as useful to the community, as if Linked Data had been put up there and linked. But the first step of actually putting the data out there is the one that nobody else can do.

    按此在新窗口浏览图片
    [URL=http://data.gov/]Data.gov[/URL], a catalog of public data, was [URL=http://www.readwriteweb.com/archives/datagov_finally_launches_looks_nice_but_short_on_d.php]launched in May by the U.S. government[/URL]

    The way to go is for government departments to go the extra step and convert [their data] into Linked Data. One of the nice things about Linked Data, when they have a pile of it, is that they could run a SPARQL server on it. SPARQL servers are a commodity product, a solution for all of the people who say 'but actually I wanted to have XML.' A SPARQL server will generate an XML file [and] allow somebody to write out, effectively, a URL for the XML file.

    "Linked Data is the backplane, it's the thing that you connect to in both directions."

    In fact, I don't see why SPARQL servers shouldn't provide CSV files, something which as far as I know isn't in the standards. But I'd recommend it, certainly in government context, because CSV files are what people have and what people want.

    So the message [for government] is to use RDF. Linked Data is the [URL=http://en.wikipedia.org/wiki/Backplane]backplane[/URL], it's the thing that you connect to in both directions. As a [web] producer your job is to make sure that you produce Linked Data one way or another. And as a consumer, there are lots of ways to consume that data once it's out there as Linked Data.

    [B]In [URL=http://www.readwriteweb.com/archives/readwriteweb_interview_with_tim_berners-lee_part_2.php]Part 2 of this interview[/URL][/B] we discuss: how previously reticent search engines like Google and Yahoo have begun to participate in the Semantic Web in 2009, user interfaces for browsing and using data, what Tim Berners-Lee thinks of new computational engine Wolfram Alpha, how e-commerce vendors are moving into the Linked Data world, and finally how the Internet of Things intersects with the Semantic Web. [B][URL=http://www.readwriteweb.com/archives/readwriteweb_interview_with_tim_berners-lee_part_2.php]Read Part 2 here[/URL][/B].

    Footnotes:

    1. The [URL=http://www.readwriteweb.com/archives/the_readwrite_w.php]very first sentence written on this blog[/URL], on 20 April, 2003, was: "The World Wide Web in 2003 is beginning to fulfill the hopes that Tim Berners-Lee had for it over 10 years ago when he created it."

    2. For more on read/write browsers, you can read another early RWW post entitled [URL=http://www.readwriteweb.com/archives/what_became_of.php]What became of the Browser/Editor[/URL].

    3. DBpedia is a community project to extract structured information from Wikipedia; see [URL=http://www.readwriteweb.com/archives/where_to_find_open_data_on_the.php]ReadWriteWeb's profile[/URL] of this and similar resources.


       收藏   分享  
    顶(0)
      




    ----------------------------------------------

    -----------------------------------------------

    第十二章第一节《用ROR创建面向资源的服务》
    第十二章第二节《用Restlet创建面向资源的服务》
    第三章《REST式服务有什么不同》
    InfoQ SOA首席编辑胡键评《RESTful Web Services中文版》
    [InfoQ文章]解答有关REST的十点疑惑

    点击查看用户来源及管理<br>发贴IP:*.*.*.* 2009-7-10 10:20:00
     
     Humphrey 帅哥哟,离线,有人找我吗?狮子座1981-7-23
      
      
      威望:1
      等级:研二(搞定了DL,再搞定F-Logic!)
      文章:937
      积分:5743
      门派:W3CHINA.ORG
      注册:2008-3-12

    姓名:(无权查看)
    城市:(无权查看)
    院校:(无权查看)
    给Humphrey发送一个短消息 把Humphrey加入好友 查看Humphrey的个人资料 搜索Humphrey在『 最新动态 & 业界新闻 』的所有贴子 引用回复这个贴子 回复这个贴子 查看Humphrey的博客2
    发贴心情 
    对伯纳斯·李的访谈,相当值得一看。
    以关联的数据作为访谈的开始,是借重关联数据在网络中的作用吧。

    ----------------------------------------------
    鸿丰

    点击查看用户来源及管理<br>发贴IP:*.*.*.* 2009-7-11 11:32:00
     
     GoogleAdSense狮子座1981-7-23
      
      
      等级:大一新生
      文章:1
      积分:50
      门派:无门无派
      院校:未填写
      注册:2007-01-01
    给Google AdSense发送一个短消息 把Google AdSense加入好友 查看Google AdSense的个人资料 搜索Google AdSense在『 最新动态 & 业界新闻 』的所有贴子 访问Google AdSense的主页 引用回复这个贴子 回复这个贴子 查看Google AdSense的博客广告
    2019-8-18 6:45:41

    本主题贴数2,分页: [1]

    管理选项修改tag | 锁定 | 解锁 | 提升 | 删除 | 移动 | 固顶 | 总固顶 | 奖励 | 惩罚 | 发布公告
    W3C Contributing Supporter! W 3 C h i n a ( 2 0 0 3 - 2 0 1 0 ) 旗 下 站 点
    苏ICP备05006046号《全国人大常委会关于维护互联网安全的决定》《计算机信息网络国际联网安全保护管理办法》
    62.500ms