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Intro to the Semantic Web
Duration:
6 minutes and 6 seconds
Year: 2008
Country:
Spain
Language:
English
Genre:
Instructional
Views:
8,943
(6,402
embedded)
Posted by:
dreig on Sep 21, 2008
A short introduction to the semantic web. All source material in the Digital Bazaar wiki
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Video Transcription
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- This is a quick introduction to the semantic web.
- Over the next couple of minutes i´ll write lines about the talkest problems the web is facing today.
- I´ll also explain what´s being done about it and how it´s going to affect you.
- You don´t need to be a web developer or blogger to understand any of the concepts on the shore ...
- If you can open a web browser, then you can understand the semantic web.
- So before going any further is important to know what the world semantics actually means.
- Semantic is related to sintax.
- In most languages sintax is how you say something whereas semantics is the meaning behind what you say.
- Let´s take the frase "I love technology" as an example...
- The sintax is all the letters, words and punctuation in the sentence,
- the semantic is what the sentence actually means.
- In this case it means that you enjoy learning about and using new technology.
- Now if you want to change the sentence using a different symbol for the word "love",
- we´ve changed the sintax of the sentence, however note that the semantics of the sentence is still the same:
- when you write i "heart" technology still means that you enjoy learning about and using new technology.
- When we talk about sintax or semantics, what we´re really talking about is communication.
- When you want to communicate with somebody else, you use your voice to do so.
- The internet created an standard way for computers to communicate with one another.
- In other words it gave a voice to computers so that they may talk to each other and exchange information.
- However, much like appeared mimic kind of sounds so that understanding them, computers merely mimic kind of information to one another.
- So Internet enables computers to talk to one another, it was not designed to teach them what the information actually means.
- When the web came along and create a quick and easy way for ask to retrieve and view information,
- you can think of the web as a huge document storage and retrieval system.
- When you put a website adress in your browser it sends a request to the website.
- The request basically says that you would like the document located at the adress that you gave in.
- The website retrieves a document and sends it back yo your web browser.
- This document is read in a languaje called HTML.
- The HTML language defines the syntax that computers can understand.
- It tells the computers how to display the document to you.
- So the two really things that the web did is create a way to get any document on the internet
- and it also created the sintax, called HTML, that is used to display the document for you.
- So what´s the big deal?
- we have the internet that let´s us talk to each other, we have the web, that let´s us store and retrieve any document on the internet
- and we have search engines wich in find just about any website that we want.
- The web is actually pretty good so how we' re gonna make it better?
- The aswer lies in semantics. Remember computers today just politely retrieves and storage information, that´s the problem..
- computers still don´t understand the meaning behind the web pages that they´re showing us.
- While they may understand the syntax, the semantics are losted on them.
- Now if we could get computers to recognize what is on a web page, they could learn what we´re interested in.
- If they know that, then they can help us get what we want,
- they would change from possibly helping us to actually helping us.
- This is really what the semantic web is all about.
- It helps computers to understand the meaning behind a web page.
- The web of today is about documents, whereas the semantic web is about things.
- When i say things i mean any thing: people, places, events, music, movies, organizations and just about any concept that you can think of.
- The semantic web is not only about pointing this things out to a computer, but also about letting computers know how all of these things are related to each other.
- There are several promising technologies that are used today that can embed semantics in each html documents.
- Two of the more popular ways are called microformats and RDF.
- So, the semantic web stuff is not something gonna happen in the future, it´s about something that is happening today.
- Things get really exciting when we start to explore the possibilities of the semantic web.
- Once your computer can understand what a person, a place and event is,
- it can strong helping you interact with those things.
- For example, if a particular party is marked up as an event on a date in a place,
- you can tell the computer to set the date in your calendar.
- Another example is in the world of music blogs.
- Music blogs usually list songs and albums reviews, on different pages.
- If the blog marked up the songs and the artists using semantic technology, you can tell your browser to find all the songs on the pages.
- Or search the internet for other albums by the same artist.
- Search engines will also become more accured than they are today.
- When you search you can say that you´re searching for a person, a place or a particular song.
- The search engine could surf websites with far more accuracy because it won´t happen that just deppend on keywords in webpages anymore.
- It can also deppend on the semantics in that web page.
- So the semantic web holds a great deal promise in making our lives easier by helping computers to help us get what we want.
- If you´d like to find out more about the semantic web there are a couple of websites that are good starting points.
- If you´d like to know how all this looks at a web browser, check out the operator plugin for the firefox web browser.
- There is also a group of people on the web called microformats community that are working and spreading the idea of the semantic web.
- Last but not least, the semantic web is also made a focus of the World Wide Web Consortium.
- They are the people who are working on xhtml and RDF and many of the other technologies that power the semantic web today.
- And in the future.
- This entire video and all of the souce material used to make it
- is developed under a creative commons atribution share like license.
- That means that you can remix and distribute copies of this video over the web, or via any computer network.
- I hope that you´ve learnt a bit more about web semantics and why it´s an important part of the web future.
- If you found this introduction helpful, please share with your friends.
- Subtitles: dreig. http://elcaparazon.net. Semantic planet: http://semanticaweb.info


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