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Combine your QA Systems

You may have at your disposal RDF data and documents about a common subject. For example:

  • the cocktail RDF dataset we used in Tutorial UI Graph
  • a pdf about cocktails and their history (here we will use data from Wikipedia)

You would like to have answers on both those data sources. You can combine 2 QA Systems (one based on RDF data and one based on documents) so you can query both sources at once.



To access the creation page, check Introduction and Access section!

Create a combined QA System


You need two existing QA Systems (one of each type RDF and Document) to create a combined QA System.

First click on the Add button and choose Combined. You will arrive here:

Here are the QA Systems you have access to, shared ones included. They can be differentiated by their


You can select one system of each type (RDF and Document). These two systems must have a common language, and it will be automatically filled in the language field.


You can also use

shared QA Systems to create your combined one.


If the owner of a shared QA System deletes it, your combined QA System will be deleted too.

Once you have selected two QA Systems, you can click on Finish. Your combined QA System is now created and you can query it, it appears in your home page like the other QA Systems.

You may have noticed that combined systems do not impact your quotas. You can create as many as you want.

As you can see you can query it like any other QA System. You can also share it with other users.


You can now query 2 types of data at once meaning you can ask questions like:

  • What are margarita ingredients?
  • When was the term "cocktail" first mentioned as a beverage?

You will get answer from the most adapted sub QA System. For example, if you ask "What are margarita ingredients?", you will get an answer from the RDF QA System because it has a better knowledge of ingredients. If you ask "When was the term 'cocktail' first mentioned as a beverage?", you will get an answer from the Document QA System because it has a better knowledge of history.


We try to prioritize answers based on RDF data because they are more precise. If the answer's confidence exceeds 50%, we will display it. If not, we will display the answer from the Document based QA System.


You can switch between the two answers by clicking on the button at the right of the search bar. It will look like this

text logo

to show the text answer and like this

kg logo

to show the RDF based answer.

Feedbacks and training

You can give feedbacks on a combined QA System like you would on a normal QA System.


The feedbacks will be saved in the sub QA System corresponding to the answer you gave feedback on.

There is no training page for a combined QA System, but you can train the sub QA Systems separately.


To improve your results on your combined QA System it is recommended to give feedbacks and train both sub QA Systems.


You can also share your combined QA System like your other QA System. You may have sharing restrictions if you used shared QA Systems to create your combined one.


First, note that in order to share a combined QA System, the same sharing options will be applied to both QA Systems you used to create it (let's call them sub QA Systems).

  1. You own the 2 sub QA Systems or you have "Read and Write" access to both of them
    • You can share your combined QA System with any user and choose their rights. They will have the same access to the sub QA Systems.
    • You can open your combined QA System to the public. The sub QA Systems will be open to the public too.
  1. You have "Read only" access to one or both sub QA Systems
    • You can share your combined QA System with any user but the rights are restricted to "Read only", this will be the same for the sub QA Systems.
    • You cannot open your combined QA System to the public.

Deletion / Unsharing

A combined QA System is a combination of two sub QA Systems, and deleting or unsharing actions can have consequences on other systems.

ActionEffect on Combined QA SystemEffect on Sub QA Systems
Deleting a combined systemDeleted the combined system-
Unsharing a combined systemUnshares the combined systemSub systems stay shared
Deleting a sub-systemDeletes the combined systemOnly deletes the specific sub-system
Unsharing a sub-systemUnshares the combined systemOnly unshares the specific sub-system

Please note that when deleting a QA System that is used by one of your combined QA Systems, a confirmation step is added to prevent unintended deletion.

However, if the QA System is shared, we do not check if it is being used by any of your shared users, so please exercise caution.