TeLLer is a collection of tools that explore the use of linear logic applied to narrative generation and story telling. Currently, there are two available tools:

1. TeLLer: an interactive linear logic prover and proof explorer that is currently being used to study causality in interactive story telling.
2. CelfToGraph: a frontend to the Celf system. It allows the transformation of Celf's solutions into structured graphs that can be queried.

TeLLer is written in Haskell. Currently, we only have available the source distribution via github. Assuming that you have the Haskell platform installed in your system, you can install TeLLer following the steps:

git clone https://github.com/jff/TeLLer.git
cd TeLLer
cabal configure
cabal build

At this point the executables are in the directory dist/. So, for example, if you want to run CelfToGraph, you can execute:

dist/build/CelfToGraph/CelfToGraph

Important: CelfToGraph depends on Celf version 2.9 and, currently, you need to set the path to celf manually in the file src/CelfToGraphConf.hs. (Oh! the joy of research tools...)

TeLLer depends on readline. If you are using Mac OSX and if you have problems installing readline, the following page may be helpful:

• How do you install the haskell readline library on Mac OSX?

CelfToGraph supports a mini query language that can be used to analyse the graphs generated. The queries currently supported are:

• exists a: checks if action a exists in the generated graphs
• link a1 a2: checks if action a2 is caused by a1 in the generated graphs

The commands exists and link can be combined with the boolean operators:

~, &&, ||, <=, =>, and <=>.

For example:

link a1 a2  <=  exists a3 && exists a4

• Anne-Gwenn Bosser (Teesside University, UK)
• Marc Cavazza (Teesside University, UK)
• João F. Ferreira (Teesside University, UK)
• James Harland (RMIT University, Australia)
• Andy Kitchen (RMIT University, Australia)
• Chris Martens (Carnegie Mellon University, US)

TeLLer started being developed by Andy Kitchen (see Andy's github repository). It was further extended in January 2013 by João F. Ferreira to provide, among other features, support for focusing granularity and structured graphs generation. In the spring of 2013, CelfToGraph was added to the tool suite.