SWI-Prolog is a Prolog implementation that specifically aims at large and real-world applications. TRILL is implemented to pursue the same objective.

SWI-Prolog provides rich libraries for web programming, RDF handling, database access, networking, etc. We can not expose the full system in the web version for various reasons, security being the most important. If you want to work on a real application, download your own copy of SWI-Prolog.

So, why then this online version?

Well, the online version can offer things that a local copy can not. Here are some examples.

• No installation required. Only needs a recent browser.
• You can play with some examples to get a basic feeling what using TRILL looks like.
• You can do exercises and execute several examples
• You can save your code and share both the code and example queries with anyone on the web.
• You can collaborate using TogetherJS on a problem with anyone on the web.

The future of the online version

The current online version is based on SWISH, TRILL on SWISH will be maintained up to date with it. These are the main plans for SWISH:

• Better shared source management. Show dependencies, better search for source code, (dis)like code fragments, integrate source management with the examples menu, etc.
• Provide more rendering plugins, such as graphs, word clouds, etc.
• Further enhance embedding in course material such as Learn Prolog Now!

WARNING: if you are using Cliopatria, at the moment you cannot have installed both TRILL on SWISH and SWISH. We are working to allow you to install both on the same installation of Cliopatria. If you need both the application you can use the standalone versions. However, with TRILL on SWISH you can execute Prolog queries as in standard SWISH.

Please be patient or contribute to TRILL on SWISH at GitHub