In this chapter, we survey methods that perform keyword search on graph data. Keyword search provides a simple but user-friendly interface to retrieve information from complicated data structures. Since many real life datasets are represented by trees and graphs, keyword search has become an attractive mechanism for data of a variety of types. In this survey, we discuss methods of keyword searc...

In this abstract, we compare semantic search (in the RDF model) with keyword search (in the relational model), and illustrate how these two search paradigms are different. This comparison addresses the following questions: (1) What can semantic search achieve that keyword search can not (in terms of behavior)? (2) Why is it difficult to simulate semantic search, using keyword search on the rela...

In this paper, we introduce a notion of Oblivious Keyword Search (OKS). Let W be the set of possible keywords. In the commit phase, a database supplier T commits n data. In each transfer subphase, a user U can choose a keyword w ∈ W adaptively and find Search(w) without revealing w to T , where Search(w) is the set of all data which includes w as a keyword. We then show two efficient protocols ...