A graphical query language supporting recursion
SIGMOD '87 Proceedings of the 1987 ACM SIGMOD international conference on Management of data
The G+/GraphLog Visual Query System
SIGMOD '90 Proceedings of the 1990 ACM SIGMOD international conference on Management of data
ACM SIGMOD Record
SIGMOD '01 Proceedings of the 2001 ACM SIGMOD international conference on Management of data
Computing graphical queries over XML data
ACM Transactions on Information Systems (TOIS)
G-Log: A Graph-Based Query Language
IEEE Transactions on Knowledge and Data Engineering
The Starburst Active Database Rule System
IEEE Transactions on Knowledge and Data Engineering
Incremental Maintenance for Materialized Views over Semistructured Data
VLDB '98 Proceedings of the 24rd International Conference on Very Large Data Bases
Practical Applications of Triggers and Constraints: Success and Lingering Issues (10-Year Award)
VLDB '00 Proceedings of the 26th International Conference on Very Large Data Bases
ICDE '02 Proceedings of the 18th International Conference on Data Engineering
Reactivity on the web: paradigms and applications of the language XChange
Proceedings of the 2005 ACM symposium on Applied computing
XQBE (XQuery By Example): A visual interface to the standard XML query language
ACM Transactions on Database Systems (TODS)
Query-by-example: a data base language
IBM Systems Journal
Expressing and managing reactivity in the semantic web
OTM'10 Proceedings of the 2010 international conference on On the move to meaningful internet systems: Part II
Expressing and managing reactivity in the semantic web
OTM'10 Proceedings of the 2010 international conference on On the move to meaningful internet systems: Part II
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While XQuery is becoming a standard, the W3C is currently discussing the features of an update language for XML, and its requirements. Therefore, time is ripe for designing and defining the language features and extensions that are usually needed when updates are supported: reaction policies to constraint violations, business rules, and more. In the past years, several languages have been proposed for updates as well as for triggers in XML, such as XUpdate and Active XQuery. In this paper, we propose a visual approach to the formulation of active rules building on XQBE, a graphical query language for XML data. Our approach is motivated by the need to provide unskilled users with the ability to express business rules in an intuitive fashion. Visual triggers are then translated into statements that can be interpreted by query engines.