1. Linked Data Theatre
Federated data

2. The Challenge A lot of structured data is available on the web
But we don’t have a easy way of access
client ??
data
data
data
data
website
website
website
website

3. The Challenge
We want some easy way to access the data, using all the advantages of Linked Data and RESTfull API’s
SPARQL endpoint are not the (only) solution

4. An example

5. Why not like this?

6. Architecture Any23 To retrieve any structured data, and deliver RDF
jSoup
To clean the response and return valid syntax
Apache httpClient
To fetch the data from a http server
Website
with data

7. Example

8. Combining results: federated SPARQL
But: lot’s of websites don’t have SPARQL endpoints!
SPARQL
endpoint
SPARQL
endpoint
service
Local
data
Remote
data

9. Virtual sparql endpoint
service
Jena in memory
SPARQL endpoint
Any23
jSoup
Apache httpClient
Website
with data

10. Non-RDF structured data
A lot of RESTfull API’s are available, but aren’t linked data
We should be able to use those API’s!

11. Virtual sparql endpoint
service
Jena in memory
SPARQL endpoint
Script
per API
XSLT
jSoup
Apache httpClient
Website
with data

12. Example (service call)

13. Example (sparql call)