Schema mappings are high-level specifications that describe the relationship between two database schemas. They are an important tool in several areas of database research, notab...
In this paper we introduce “clipping,” a new method of syntactic approximation which is motivated by and works in conjunction with a sound and decidable denotational model for...
The ability to extend a language with new syntactic forms is a powerful tool. A sufficiently flexible macro system allows programmers to build from a common base towards a langua...
The notion of icons in visual environments is limited by perceiving icons as tacit entities that have meaning only to human beings and not to the machines that display them. This ...
Electronic marketplaces, or e-commerce portals, bring together many online suppliers and buyers. Each individual participant can potentially use his own format to represent the pr...