The predicate tree: a metaphor for visually describing complex Boolean queries

Authors:
Luca Paolino;Monica Sebillo;Genoveffa Tortora;Giuliana Vitiello
Affiliations:
Dipartimento di Matematica e Informatica, Università di Salerno, Fisciano, SA, Italy;Dipartimento di Matematica e Informatica, Università di Salerno, Fisciano, SA, Italy;Dipartimento di Matematica e Informatica, Università di Salerno, Fisciano, SA, Italy;Dipartimento di Matematica e Informatica, Università di Salerno, Fisciano, SA, Italy
Venue:
VISUAL'07 Proceedings of the 9th international conference on Advances in visual information systems
Year:
2007

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Abstract

In this paper, we describe a visual language, based on the so-called Predicate Tree Metaphor, which allows users to visually build complex sentences for querying commonly used search engines. By using this visual language, no parentheses have to be applied, and no precedence rules have to be known. Promising results about the usability of the proposed interface are reported, on the basis on an experimental between-group study, performed on a Yahoo-based prototype of the proposed graphical environment.