6 citations · 6 across the 4 of their papers we have counts for
6 papers
Provenance for Regular Path Queries
Gosta Grahne, Alex Thomo
Regular path queries (RPQs) the ubiquitous mechanism for querying data graphs of partially known structure. RPQs are in essence regular expressions over the edge symbols. The answe…
Universal (and Existential) Nulls
Gösta Grahne, Ali Moallemi
Incomplete Information research is quite mature when it comes to so called {\em existential nulls}, where an existential null is a value stored in the database, representing an unk…
The data-exchange chase under the microscope
Gosta Grahne, Adrian Onet
In this paper we take closer look at recent developments for the chase procedure, and provide additional results. Our analysis allows us create a taxonomy of the chase variations a…
Conditional Tables in practice
Gosta Grahne, Adrian Onet, Nihat Tartal
Due to the ever increasing importance of the internet, interoperability of heterogeneous data sources is as well of ever increasing importance. Interoperability can be achieved e.g…
Anatomy of the chase
Gosta Grahne, Adrian Onet
A lot of research activity has recently taken place around the chase procedure, due to its usefulness in data integration, data exchange, query optimization, peer data exchange and…
Mining Frequent Itemsets from Secondary Memory
Gösta Grahne, Jianfei Zhu
Mining frequent itemsets is at the core of mining association rules, and is by now quite well understood algorithmically. However, most algorithms for mining frequent itemsets assu…