DeriNet, a new database of lexical derivates, is being developed at the Institute of Formal and Applied Linguistics. Since it is a wordnet containing large amounts of trees, it is hard to visualize, search and extend without specialized tools.
This paper describes a program which has been developed to display the trees and enable finding certain types of errors, and its query language. The application is web-based for ease of use and access.
The language has been inspired by CQL, the language used for searching the Czech National Corpus, and uses similar key-words and syntax extended to facilitate searching in tree structures.