Building development environment of Japanese CCG parser using Yesod

Abstract

The development of CCG parsers requires a CCG treebank, which is known to be costly. This is mainly because checking the consistency of a tree structure is a more complex task than that of a linear structure or a dependency tree. In order to reduce this cost, we need a development environment that has knowledge of grammar: for example, when a part of a parse tree is modified, the system automatically re-parses the sentence to reflect the modification and checks the grammaticality of the modified tree. In our project, we are building such a grammar development environment as a GUI system. We implemented the system by using Yesod, a web application framework written in Haskell, and employ lightblue as a Japanese CCG parser. We demonstrate how we can display and manipulate CCG parse trees in the GUI setting.