Using DBPedia

A brief video on DBPedia and SparQL. Demonstrates how to query DBPedia for useful/interesting questions.
The SPARQL query demonstrated in the video:
--------------------------------------------------------------------------------
PREFIX dbpedia0: <dbpedia.org/ont...
PREFIX dbpedia2: <dbpedia.org/pro...
SELECT ?body ?magnitude WHERE {
?body a dbpedia0:CelestialBody.
?body dbpedia2:appmagV ?magnitude.
FILTER (?magnitude < 6)
}
ORDER BY ?magnitude
-----------------------------------------------------------
Useful DBPedia Links as described in the video:
DBPedia's Home Page - dbpedia.org/
Vega's Wikipedia Page - en.wikipedia.or...
Vega's DBPedia Page - dbpedia.org/pag...
CelestialBody Ontology Mapping - mappings.dbpedi...
DBPedia SPARQL Explorer - dbpedia.org/sno...

[@iyerranjit]

Very useful video. Crisp and to the point makes for a great introduction.

[@JonathanMugan]

Great tutorial! Exactly what I needed.

[@reshmadangol8111]

The video was very helpful, thanks. One question though, you mentioned something about having demonstrated few things in class. Do you have separate set of videos on those topics? Did not see them in your channel.

[@shashvatshukla]

Very helpful video thanks so much.
I got a better idea of what dbpedia is and how I can use it right away with sparql querying.

[@user-df4xm6by8v]

Really thank you! Very helpful for beginner,learned a lot!

[@snowsel4434]

Thanks very much for the video, please why did you have ?dbpedia2.appmagV i am curious as to where that is coming from.

[@erikbudrow1255]

Thanks for this tutorial! It was super easy to understand, to-the-point, and thorough. And kudos on using Vega as an example; that star holds a special place in my heart. I was wondering though: Why doesn't dbpedia have a box on its main page where a laymen such as myself can simply type in a question and get data back without having to learn computer language?

[@clementdong]

love your example!

[@pasjonpi]

I have a problem with SPARQL on dbpedia. I want to collect some data from diffrent kinds of animals and I thought it would be a good idea to use dbpedia, but I don't really understand how it works. I watched a video on youtube and after that I still dont really get it.
My question is now, for example, I want to search for all the frogs (or any kind of animal) and I want it to return with the Kingdom, Phylum, class, order, family, genus and species (these are in the infoboxes). How to I write the line of code?

[@pasjonpi]

btw you made a really good tutorial!

[@WilliamMahmood]

Thank you for making this :)

[@prabhu9484]

JohnM - Thanks so much - what will be the query to list all stars in the constellation Lyra ?

[@napliang6929]

thank you very much, a great tutorial.

[@mbegaliful]

Thank you so much! very clear!

[@seurat01]

Thanks so much for making this video. It is, by far, the best explanation that I've found to date on what is a very confusing subject. I can only hope that you'll do a series of videos with additional examples!
A few observations on items you may be able to clarify:
1. The SPARQL listing below the video shows the PREFIX listings with "<:" and ">" where the brackets should go.
2. When I pull the CelestialBody page from the DbPedia Ontology I get a much shorter listing than what you show in the video (3:37 mark). I'm using the following link:
mappings.dbpedia.org/server/ontology/classes/CelestialBody
This doesn't seem to affect the output, so I'm assuming that the Query finds the information since appmagV is a Property associated with a member of the CelestialBody Class.
In any case, do you knnow if there been some change in how many properties a CelestialBody can have?
3. I noticed that you declared a dbpedia2 PREFIX in the Query. There is a dbpedia2 PREFIX listed in the SPARQL Explorer in the light blue section at the top. Is there a reason that it should be restated?
Thanks,
Wayne

[@1flovera]

How can I learn DBpedia + MLib ?.
Thank you.

[@techefforts785]

hello sir, it is very useful video for me. Sir as per your example i copied that "Veka" from wikipedia and pasted like
"wiki.dbpedia.org/page/Veka" and it is giving me "page not found error".
then i looked comments and there is folloing sujjestions like-
"wiki.dbpedia.org/ontology/Vega"
"wiki.dbpedia.org/property/Vega"
but the same error is comming up.
then i tried putting slash "/" after above 3 links but it doesent work.
what should i do now.. it is very important for me to know this.. i really want to learn this.
thanking you.

[@tanmaykumar8995]

I need help. Can I contact you ?

[@RobertKost]

well done! thanks much

[@prabhu9484]

//JohnM this query is not working The results show 50 browsers that run on OS X with the os name - what is wrong with this query ?
PREFIX dbpedia-owl:
PREFIX dbpprop:
PREFIX dbres:
SELECT ?browser_name ?os_name WHERE {
?browser_name dbpprop:genre dbres:Web_browser. ?browser_name dbpprop:operatingSystem dbres:OS_X ?os_name.
}
limit 50

[@julessci2716]

This guy kind of talk like Richard from silicon Valley