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DRX

Web Developer Resource Index: Metadata

Metadata is data that describes other data. It is a summary of, or an index into some larger document or other resource. Metadata is important on the WWW for one very simple reason: the sheer mass of information available has become overwhelming, making it difficult to find something relevant or useful.

This application is a perfect example of the use of Metadata. Each resource record in the list of results that appear when you visit a category consists of several pieces of metadata:

1. the title of the resource.
2. the URI, or address to access the resource.
3. a short description of the resource.
4. the author of the document.
5. the date and time the record was last modified.

Other examples of Metadata include JPEG images, typically created by digital cameras. These binary files may contain any number of EXIF tags such as a description, the camera make and model, resolution, width and height in pixels, date and time, and more recently Geolocation information if the camera supports either an on-board GPS receiver or a port used to attach an external GPS device. Once this data is collected it can be converted into GeoURL tags that allow the user to pinpoint the location (and even the elevation) on a digital map.

Updated: Wednesday, October 29th, 2008 @ 1:53 AM EDT

Sub Categories

• Dublin Core {0}(8)[39]
• FOAF {0}(8)[40]
• GeoURL {0}(8)[63]
• OWL {0}(2)[42]
• PICS {0}(2)[41]
• RDF {0}(11)[43]
• RSS {0}(44)[44]
• Semantic Web {0}(12)[46]
• XMDP {0}(6)[45]

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Resources

• 1.Using Web Metadata

  An excellent slideshow tutorial describing Metadata, as it applies to Dublin Core, PICS and mostly in the context of the Resource Description Framwork. [269]

  ★★★★★
  URI:http://www.w3.org/People/EM/talks/www7/tutorial/part2/sld003.htm
  Author:
  Eric Miller
  [3]
  Reviewed:Sunday, April 17th, 2005 @ 5:33 AM EDT
  by:
  Douglas Clifton
  
  Using Web Metadata dublin coremetadatapicsrdfw3c
   

• 2.Semantic Data Extractor

  This tool uses HTML Tidy and an XSLT stylesheet to extract metadata from a semantically rich HTML or XHTML document. Definitely worth experimenting with and bookmarking. [1071]

  ★★★★★
  URI:http://www.w3.org/2002/08/extract-semantic
  Author:
  Dominique Hazaël-Massieux
  [5]
  Reviewed:Sunday, May 1st, 2005 @ 2:02 AM EDT
  by:
  Douglas Clifton
  
  Semantic Data Extractor htmlsemanticsw3cxhtmlxslt
   

• 3.Metadata Analysis and Mining Application

  Metadata Analysis and Mining Application (MAMA) is a structural Web document search engine—it trawls Web pages and returns results detailing page structures, including what HTML, CSS, and script is used on it, as well as whether the HTML validates. [1768]

  ★★★★☆
  URI:http://dev.opera.com/articles/view/mama/
  Author:
  Brian Wilson
  [1]
  Reviewed:Tuesday, October 21st, 2008 @ 1:52 PM EDT
  by:
  Douglas Clifton
  
  Metadata Analysis and Mining Application csshtmljavascriptmarkupmetadatasearchvalidator
   

• 4.Operator

  Provides an interactive toolbar that interfaces with pages containing microformat content. Examples: geotagged Flickr photos open Google maps to the location, hcard contacts saved to your address book, events from Upcoming.org exported to your calendar... [1695]

  ★★★★☆
  URI:http://labs.mozilla.com/2006/12/introducing-operator
  Author:
  Michael Kaply
  [1]
  Reviewed:Thursday, December 21st, 2006 @ 9:29 PM EST
  by:
  Douglas Clifton
  
  Operator extensionfirefoxflickrgooglemapsmetadatamicroformats
   

• 5.Tails

  A Firefox extension that searches for and displays microformats on Web pages. As of this review, it supports hCard, hCalendar, hReview (hint) and xFolk. An icon on the statusbar will appear, and double clicking on it opens the details in your sidebar. [1626]

  ★★★★☆
  URI:http://blog.codeeg.com/tails-firefox-extension/
  Author:
  Calvin Yu
  [1]
  Reviewed:Saturday, February 4th, 2006 @ 12:04 AM EST
  by:
  Douglas Clifton
  
  Tails extensionfirefoxhreviewmetadatamicroformatssemanticsxhtml
   

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Matching Tags

css dublin core extension firefox flickr google hreview html javascript maps markup metadata microformats pics rdf search semantics validator w3c xhtml xslt

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Last updated: Wednesday, October 29th, 2008 @ 1:53 AM EDT [2008-10-29T05:53:45Z]