Semantic Web Technologies. Brief Readings Discussion Class work: Research topics and Project discussion Research Presentation Topics assigned Building lightweight semantics. What are Lightweight Semantics?.
Semantic Web Technologies
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Class work: Research topics and Project discussion
Research Presentation Topics assigned
Building 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
For your Web browsing
For your documents
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?
Web of Trust
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?
“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
A combination of elemental formats that work with compound formats
Some are standards, some are becoming standards through use
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
A set of tools to help
This is an example of a paper to build from for a research presentation
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
Easily transformed for more structured use?
Working with APIs
Eric Meyer’s presentation
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
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?
What do the ideas build upon?
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