Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Path discovery by Querying the federation of Relational Database and RDF
  Graph   The class of queries for detecting path is an important as those can extract
implicit binary relations over the nodes of input graphs. Most of the path
querying languages used by the RDF community, like property paths in W3C SPARQL
1.1 and nested regular expressions in nSPARQL are based on the regular
expressions. Federated queries allow for combining graph patterns and
relational database that enables the evaluations over several heterogeneous
data resources within a single query. Federated queries in W3C SPARQL 1.1
currently evaluated over different SPARQL endpoints. In this paper, we present
a federated path querying language as an extension of regular path querying
language for supporting RDF graph integration with relational database. The
federated path querying language is absolutely more expressive than nested
regular expressions and negation-free property paths. Its additional
expressivity can be used for capturing the conjunction and federation of nested
regular path queries. Despite the increase in expressivity, we also show that
federated path queries are still enjoy a low computational complexity and can
be evaluated efficiently.

35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ