​

YASGUI (Yet Another Sparql GUI) is a web application to query any SPARQL (​SPARQL is an RDF query language, that is, a query language for databases, able to retrieve and manipulate data stored in Resource Description Framework format.) endpoint. 

YASGUI is a product of  COMMIT/project Data2Semantics. It enables easy access to any SPARQL endpoint on the Web of Data. As our logs show, our web service is popular among regular data consumers, with around 50.000 queries executed via YASGUI. However, as this tool is open source, publishers may host YASGUI themselves as well.

We have been in touch with developers at KennisNet, the University of Leipzig, Bloomberg, and HealthData.gov. All of these either use YASGUI in their backend, in their demo, or as a public SPARQL interface. For some of these we managed to receive testimonials:

"YASGUI is an effortless utility. At HHS, we overload our SPARQL endpoint. Well formed queries are forwarded to the true SPARQL endpoint; anything else is forwarded to YASGUI. This creates a web GUI for an, otherwise, webservice-only interface. This makes our SPARQL endpoint more useful and welcoming to new developers. I've provided feedback to Laurens on many occasions, in support of our usecase. He has been extremely responsive; simply amazing. Currently the Smithsonian American Art Museum is publishing the artist and artwork collections data as linked open data. We are using YASGUI as an embeddable iframe on our webpage to allow other users to write and test their queries to our SPARQL endpoint. We are at the very beginnings of this endeavor and our web page has not yet been published live but hopefully will be shortly. We are hoping to expand on linked open data as time goes on but right now we just have a sparql endpoint. Perhaps we can get back to you when we are further along in the process."
- Doug Whitehead, HealthData.gov

"Currently the Smithsonian American Art Museum is publishing the artist and artwork collections data as linked open data. We are using YASGUI as an embeddable iframe on our webpage to allow other users to write and test their queries to our SPARQL endpoint. We are at the very beginnings of this endeavor and our web page has not yet been published live but hopefully will be shortly. We are hoping to expand on linked open data as time goes on but right now we just have a sparql endpoint. Perhaps we can get back to you when we are further along in the process."
- Catherine Beverly, Smithsonian American Art Museum