Netgraph Query Language for the Prague Dependency Treebank 2.0

Abstract

Netgraph Query Language for the Prague Dependency Treebank 2.0 We study the annotation of the Prague Dependency Treebank 2.0 (PDT 2.0) and assemble a list of requirements on a query language that would allow searching for and studying all linguistic phenomena annotated in the treebank. We propose an extension to the query language of an existing search tool Netgraph 1.0 and show that the extended query language satisfies the list of requirements. We demonstrate how all principal linguistic phenomena annotated in the treebank can be searched for with the proposed query language and compare the query language to some other treebank search systems. The proposed query language has been implemented in the search tool Netgraph - we talk about features of a search tool that can simplify the searching and make it more powerful. We also present a table that shows the extent of usage of various features of the implemented query language by the users of Netgraph and mention several usages of Netgraph for other treebanks than PDT 2.0.