NiagaraCQ: a scalable continuous query system for Internet databases
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
Continual Queries for Internet Scale Event-Driven Information Delivery
IEEE Transactions on Knowledge and Data Engineering
Identifying frequent items in sliding windows over on-line packet streams
Proceedings of the 3rd ACM SIGCOMM conference on Internet measurement
The VLDB Journal — The International Journal on Very Large Data Bases
The CQL continuous query language: semantic foundations and query execution
The VLDB Journal — The International Journal on Very Large Data Bases
A data stream language and system designed for power and extensibility
CIKM '06 Proceedings of the 15th ACM international conference on Information and knowledge management
Data Stream Management: Processing High-Speed Data Streams (Data-Centric Systems and Applications)
Data Stream Management: Processing High-Speed Data Streams (Data-Centric Systems and Applications)
Yago: a core of semantic knowledge
Proceedings of the 16th international conference on World Wide Web
Grouping and Aggregate queries Over Semantic Web Databases
ICSC '07 Proceedings of the International Conference on Semantic Computing
Processing sliding window multi-joins in continuous queries over data streams
VLDB '03 Proceedings of the 29th international conference on Very large data bases - Volume 29
Query languages and data models for database sequences and data streams
VLDB '04 Proceedings of the Thirtieth international conference on Very large data bases - Volume 30
Using the Semantic Web for linking and reusing data across Web 2.0 communities
Web Semantics: Science, Services and Agents on the World Wide Web
Situational reasoning for task-oriented mobile service recommendation
The Knowledge Engineering Review
Interlinking the Social Web with Semantics
IEEE Intelligent Systems
SKOS core: simple knowledge organisation for the web
DCMI '05 Proceedings of the 2005 international conference on Dublin Core and metadata applications: vocabularies in practice
COMMON-SENSE SPATIAL REASONING FOR INFORMATION CORRELATION IN PERVASIVE COMPUTING
Applied Artificial Intelligence
It's a Streaming World! Reasoning upon Rapidly Changing Information
IEEE Intelligent Systems
Distributed Resolution for Expressive Ontology Networks
RR '09 Proceedings of the 3rd International Conference on Web Reasoning and Rule Systems
An execution environment for C-SPARQL queries
Proceedings of the 13th International Conference on Extending Database Technology
Streaming SPARQL extending SPARQL to process data streams
ESWC'08 Proceedings of the 5th European semantic web conference on The semantic web: research and applications
An adaptive nearest neighbor classification algorithm for data streams
PKDD'05 Proceedings of the 9th European conference on Principles and Practice of Knowledge Discovery in Databases
Incremental reasoning on streams and rich background knowledge
ESWC'10 Proceedings of the 7th international conference on The Semantic Web: research and Applications - Volume Part I
OWL reasoning with WebPIE: calculating the closure of 100 billion triples
ESWC'10 Proceedings of the 7th international conference on The Semantic Web: research and Applications - Volume Part I
Web Semantics: Science, Services and Agents on the World Wide Web
LODStats --- an extensible framework for high-performance dataset analytics
EKAW'12 Proceedings of the 18th international conference on Knowledge Engineering and Knowledge Management
SRBench: a streaming RDF/SPARQL benchmark
ISWC'12 Proceedings of the 11th international conference on The Semantic Web - Volume Part I
QuerioCity: a linked data platform for urban information management
ISWC'12 Proceedings of the 11th international conference on The Semantic Web - Volume Part II
PQMPMS: a preference-enabled querying mechanism for personalized mobile search
RR'13 Proceedings of the 7th international conference on Web Reasoning and Rule Systems
StreamRule: a nonmonotonic stream reasoning system for the semantic web
RR'13 Proceedings of the 7th international conference on Web Reasoning and Rule Systems
Ontology patterns for complex activity modelling
RuleML'13 Proceedings of the 7th international conference on Theory, Practice, and Applications of Rules on the Web
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Continuous SPARQL (C-SPARQL) is a new language for continuous queries over streams of RDF data. CSPARQL queries consider windows, i.e., the most recent triples of such streams, observed while data is continuously flowing. Supporting streams in RDF format guarantees interoperability and opens up important applications, in which reasoners can deal with knowledge evolving over time. Examples of such application domains include real-time reasoning over sensors, urban computing, and social semantic data. In this paper, we present the C-SPARQL language extensions in terms of both syntax and examples. Finally, we discuss existing applications that already use C-SPARQL and give an outlook on future research opportunities.