  A price information retrieval (IR) system allows users to search and view
differences among prices of specific products. Building product-price driven IR
system is a challenging and active research area. Approaches entirely depending
products information provided by shops via interface environment encounter
limitations of database. While automatic systems specifically require product
names and commercial websites for their input. For both paradigms, approaches
of building product-price IR system for Vietnamese are still very limited. In
this paper, we introduce an automatic Vietnamese IR system for product-price by
identifying and storing Xpath patterns to extract prices of products from
commercial websites. Experiments of our system show promising results.
