5min Introduction to Linked Data

Query Processing and Trustworthiness in the Web of Linked Data (Olaf Hartig) 2

What islinked data

?

Query Processing and Trustworthiness in the Web of Linked Data (Olaf Hartig) 3

CIA WorldFactbook

MovieDB

Data exposedto the Webvia HTML

The classic Web:

Query Processing and Trustworthiness in the Web of Linked Data (Olaf Hartig) 4

Information fromsingle pages

can be found viasearch engines

The classic Web:

Query Processing and Trustworthiness in the Web of Linked Data (Olaf Hartig) 5

The classic Web:

How about complex queries overmultiple pages / data sources?

What documentariesare filmed in countries with an

unemployment rate above 10%?

Impossible.

Query Processing and Trustworthiness in the Web of Linked Data (Olaf Hartig) 6

What do we actually want?

Use the Web like a single global database

MovieDBCIA WorldFactbook

Query Processing and Trustworthiness in the Web of Linked Data (Olaf Hartig) 7

Linked data enables such aWeb of data

CIA WorldFactbook MovieDB

Query Processing and Trustworthiness in the Web of Linked Data (Olaf Hartig) 8

Global Identifier: URI

http://...imdb.../data/WarChildDocu

CIA WorldFactbook

http://cia..../Albania

http://...imdb.../genres/Documentary

Linked data enables such aWeb of data

MovieDB

Query Processing and Trustworthiness in the Web of Linked Data (Olaf Hartig) 9

CIA WorldFactbook

http://cia..../Albania

Global Identifier: URIData Model: RDF

13.2 %

http://.../unemp_rate

http://...imdb.../genres/Documentary

"War Child"http://.../genre

http://...imdb.../data/WarChildDocu

http://.../name

Linked data enables such aWeb of data

MovieDB

Query Processing and Trustworthiness in the Web of Linked Data (Olaf Hartig) 10

CIA WorldFactbook

http://cia..../Albania

Global Identifier: URIData Model: RDFAccess Mechanism: HTTP

13.2 %

http://.../unemp_rate

http://...imdb.../genres/Documentary

"War Child"http://.../genre

http://...imdb.../data/WarChildDocu

http://.../name

Linked data enables such aWeb of data

MovieDB

Query Processing and Trustworthiness in the Web of Linked Data (Olaf Hartig) 11

CIA WorldFactbook

http://cia..../Albania

http://...imdb.../genres/Documentary

Global Identifier: URIData Model: RDFAccess Mechanism: HTTPConnection: Typed Links

http://.../name

13.2 %

http://.../unemp_rate

http://.../filming_locationhttp://...imdb.../data/WarChildDocu

"War Child"http://.../genre

Linked data enables such aWeb of data

MovieDB

Query Processing and Trustworthiness in the Web of Linked Data (Olaf Hartig) 12

Global Identifier: URIData Model: RDFAccess Mechanism: HTTPConnection: Typed Links

CIA WorldFactbook

http://cia..../Albania

http://...imdb.../genres/Documentary

http://.../name

13.2 %

http://.../unemp_rate

http://.../filming_locationhttp://...imdb.../data/WarChildDocu

"War Child"http://.../genre

What documentariesare filmed in countries with an

unemployment rate above 10%?

Linked data enables such aWeb of data

MovieDB

Query Processing and Trustworthiness in the Web of Linked Data (Olaf Hartig) 31

Thank you!

Query Processing and Trustworthiness in the Web of Linked Data (Olaf Hartig) 32

These slides have been created byOlaf Hartig

http://olafhartig.de

This work is licensed under aCreative Commons Attribution-Share Alike 3.0 License

(http://creativecommons.org/licenses/by-sa/3.0/)

Attribution:● http://www.flickr.com/photos/mrfaber/247946146/● www.opte.org● http://www.flickr.com/photos/hartkopf/1586832162/