Abstract
AlpinoGraph is a graph-based search engine which provides treebank search using SQL databasetechnology coupled with the Cypher query language for graphs. In the paper, we show that
AlpinoGraph is a very powerful and very flexible approach towards treebank search. At thesame time, AlpinoGraph is efficient. Currently, AlpinoGraph is applicable for all standard Dutchtreebanks. We compare the Cypher queries in AlpinoGraph with the XPath queries used inearlier treebank search applications for the same treebanks. We also present a pre-processingtechnique which speeds up query processing dramatically in some cases, and is applicable beyond
AlpinoGraph.