Semantic web technologies
This presentation is the property of its rightful owner.
Sponsored Links
1 / 12

Semantic Web Technologies PowerPoint PPT Presentation


  • 34 Views
  • Uploaded on
  • Presentation posted in: General

Semantic Web Technologies. Brief Readings Discussion Class work: Research topics and Project discussion Research Presentation Topics assigned Building lightweight semantics. What are Lightweight Semantics?.

Download Presentation

Semantic Web Technologies

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Semantic web technologies

Semantic Web Technologies

  • Brief Readings Discussion

  • Class work: Research topics and Project discussion

  • Research Presentation Topics assigned

  • Building lightweight semantics


What are lightweight semantics

What are Lightweight Semantics?

  • The bottom-up, user created, context-driven set of markup conventions (not standards) that can be used to provide associative metadata in human readable formats

  • Metadata

    • For music

    • For your Web browsing

    • For your documents

  • Microformats

  • Emergent Semantics


Taking a stand on the sem web

Taking a Stand on the Sem Web

  • Can the semantic Web scale?

    • Can there be enough agreement for true sharing?

    • How much can be predicted based on current use?

  • Should the semantic Web be like MARC records?

    • What about MARC-up consistency?

      • Training & standards

    • Who is the LoC or OCLC in the Sem Web?

    • Are Web Services & APIs like Z39.50?

  • Semantic SPAM?

    • Web of Trust


Stand for lightweight semantics

Stand for Lightweight Semantics?

  • “any underlying assumptions about use are highly situated”

    • Does this imply that only experts should tag things?

  • But the algorithms & heuristics are assembled by experts right?

  • How do you embed good semantics?

    • At time of use?

    • In the creation system?

  • Is all this tagging at the cost of the user?

    • Time to tag, time for finding

    • But what if I organize my own data as well?

  • Why can’t the SW experts be the same people as the MARC experts?


Microformats

Microformats

  • “Designed for humans first and machines second, microformats are a set of simple, open data formats built upon existing and widely adopted standards. Instead of throwing away what works today, microformats intend to solve simpler problems first by adapting to current behaviors and usage patterns (e.g. XHTML, blogging).”

  • Let’s go to the site


Microfomats

Microfomats

  • A combination of elemental formats that work with compound formats

  • Some are standards, some are becoming standards through use


Lightweight mark up

Lightweight Mark-Up

  • Markup for accessibility helps with the Semantic Web

  • Validating markup helps build the Semantic Web

  • “Semantic Overhead” during Web page creation

  • Use simple semantics for context

    • Class

    • Id

    • Meta tags

  • A set of tools to help

  • This is an example of a paper to build from for a research presentation


Emergent semantics

Emergent Semantics

  • Ad hoc semantics

  • Use known markup formats (XHTML) for representing your structures

    • Like using CSS to control display

    • Easier to read than some semantic (meta) data

    • “rel” values

  • Easily transformed for more structured use?

    • Working with APIs

  • Eric Meyer’s presentation


Let s use some microformats

Let’s use some microformats

  • Build some lightweight markup to describe your friendships

  • The hard way:

    • <a href="http://www.ischool.utexas.edu/~donturn" rel="friend met colleague neighbor">Don Turnbull</a>

  • The easy way: http://gmpg.org/xfn/creator


Let s talk about topics

Let’s talk about topics

  • Discuss your topic ideas with your new XFN friend

  • What are the basic ideas that apply to the Semantic Web, Web 2.0, Web Services, or Lightweight Semantics?

  • How would you show the ideas?

    • examples

  • What do the ideas build upon?

    • research


Topic selection

Topic Selection

  • Choose a topic (and corresponding week) to overview

  • Topic Presentations should include:

    • Overview of the technology

    • Provide examples of the technology in use

    • Show how to build using the technology (examples)

    • A list of citations and readings that you drew from and for extended reference

      • Do not rely on wikipedia & blogs as your only sources

      • Academic journal & conference papers

      • Books (development or conceptual design)

  • How can these Semantic Web technologies help coordinate, discover, organize information and knowledge?

  • Your own point of view about the practicality & promise of these tools & procedures


Current list of topics

Current list of Topics

  • RDF

  • Metadata (e.g. Dublin Core, MediaRSS)

  • Ontology building (applications)

  • REST, XMLHttpRequest & AJAX

  • Greasemonkey

  • Javascript: Introduction

  • Javascript: Advanced

  • TagClouds

  • GIS, Maps & Mapping Mashups

  • XSLT

  • WordNet

  • Semantic Commerce

  • Trust


  • Login