Arboricity and subgraph listing algorithms
SIAM Journal on Computing
A graphical query language supporting recursion
SIGMOD '87 Proceedings of the 1987 ACM SIGMOD international conference on Management of data
Expressing structural hypertext queries in graphlog
HYPERTEXT '89 Proceedings of the second annual ACM conference on Hypertext
Flexible queries over semistructured data
PODS '01 Proceedings of the twentieth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Declarative specification of Web sites with S
The VLDB Journal — The International Journal on Very Large Data Bases
UnQL: a query language and algebra for semistructured data based on structural recursion
The VLDB Journal — The International Journal on Very Large Data Bases
Peopleware: key to success of information systems
ACM SIGCPR Computer Personnel
Regular path queries under approximate semantics
Annals of Mathematics and Artificial Intelligence
A query language for biological networks
Bioinformatics
Survey of graph database models
ACM Computing Surveys (CSUR)
Graphs-at-a-time: query language and access methods for graph databases
Proceedings of the 2008 ACM SIGMOD international conference on Management of data
NAGA: harvesting, searching and ranking knowledge
Proceedings of the 2008 ACM SIGMOD international conference on Management of data
SoQL: A Language for Querying and Creating Data in Social Networks
ICDE '09 Proceedings of the 2009 IEEE International Conference on Data Engineering
Ranking Approximate Answers to Semantic Web Queries
ESWC 2009 Heraklion Proceedings of the 6th European Semantic Web Conference on The Semantic Web: Research and Applications
A query language for analyzing networks
Proceedings of the 18th ACM conference on Information and knowledge management
Analysis of a Real Online Social Network Using Semantic Web Frameworks
ISWC '09 Proceedings of the 8th International Semantic Web Conference
Expressive languages for path queries over graph-structured data
Proceedings of the twenty-ninth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
IEEE Internet Computing
Adding regular expressions to graph reachability and pattern queries
ICDE '11 Proceedings of the 2011 IEEE 27th International Conference on Data Engineering
Semantics and complexity of SPARQL
ISWC'06 Proceedings of the 5th international conference on The Semantic Web
Query languages for graph databases
ACM SIGMOD Record
A novel approach to modeling context-aware and social collaboration processes
CAiSE'12 Proceedings of the 24th international conference on Advanced Information Systems Engineering
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Many query languages for graph-structured data are based on regular path expressions, which describe relations among pairs of nodes. We propose an extension that allows to retrieve groups of nodes based on group structural characteristics and relations to other nodes or groups. It allows to express group selection queries in a concise and natural style, and can be integrated into any query language based on regular path queries. We present an efficient algorithm for evaluating group queries in polynomial time from an input data graph. Evaluations using real-world social networks demonstrate the practical feasibility of our approach.