Query languages for graph databases started to be investigated some 25 years ago. With
much current data, such as linked data on the Web and social network data, being graph …

With the emergence of new applications, eg, computational biology, new software
engineering techniques, social networks, etc., more data is in the form of graphs. Locating …

More and more (semi) structured information is becoming available on the web in the form of
documents embedding metadata (eg, RDF, RDFa, Microformats and others). There are …

With the increasing popularity of XML for data representations, there is a lot of interest in
searching XML data. Due to the structural heterogeneity and textual content's diversity of …

Abstract The Database Group (DBGroup, www. dbgroup. unimore. it) and Information
System Group (ISGroup, www. isgroup. unimore. it) research activities have been mainly …

This paper proposes a notion of fuzzy graph database and describes a fuzzy query algebra
that makes it possible to handle such database, which may be fuzzy or not, in a flexible way …

It is increasingly common to find graphs in which edges are of different types, indicating a
variety of relationships. For such graphs we propose a class of reachability queries and a …

Recent progress in biology and computer science have generated many complicated
networks, most of which can be modeled as large and dense graphs. Developing effective …

Given the heterogeneity of complex graph data on the web, such as RDF linked data, it is
likely that a user wishing to query such data will lack full knowledge of the structure of the …

Graph databases have aroused a large interest in the last years thanks to their large scope
of potential applications (eg social networks, biomedical networks, data stemming from the …