Semantics for hierarchical task-network planning
Semantics for hierarchical task-network planning
ACM SIGMOD Record
A Semi-monad for Semi-structured Data
ICDT '01 Proceedings of the 8th International Conference on Database Theory
On Structured Workflow Modelling
CAiSE '00 Proceedings of the 12th International Conference on Advanced Information Systems Engineering
Logging and Post-Mortem Analysis of Workflow Executions Based on Event Histories
RIDS '97 Proceedings of the Third International Workshop on Rules in Database Systems
Quilt: An XML Query Language for Heterogeneous Data Sources
Selected papers from the Third International Workshop WebDB 2000 on The World Wide Web and Databases
Modeling Interorganizational Workflows with XML Nets
HICSS '01 Proceedings of the 34th Annual Hawaii International Conference on System Sciences ( HICSS-34)-Volume 7 - Volume 7
Beyond Discrete E-Services: Composing Session-Oriented Services in Telecommunications
TES '01 Proceedings of the Second International Workshop on Technologies for E-Services
Design and management of flexible process variants using templates and rules
Computers in Industry
Towards a Formal Semantics for the Process Model of the Taverna Workbench. Part I
Fundamenta Informaticae
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In both industry and the research community it is now common to represent workflow schemas and enactments using XML. As a matter of fact, more and more enterprise application integration platforms (e.g., Excelon, Bea, iPlanet, etc.) are using XML to represent workflows within or across enterprise boundaries. In this paper we explore the ability of modern XML query languages (specifically, the W3C XML Algebra underlying the forthcoming XQuery) to query and manipulate workflow schemas and enactments represented as XML data. The paper focuses on a simple, yet expressive, model called Workflow Query Model (WQM) offering four primary constructs: sequence, choice, parallel, and loop. Then three classes of queries are considered against WQM workflows: simple (e.g., to check the status of enactments), traversal (e.g., to check the relationship between tasks, or check the expected running time of a schema), and schema construction (e.g., to create new schemas from a library of workflow components). This querying functionality is quite useful for specifying, enacting and supervising e-services in various e-commerce application contexts and it can be easily specified using the W3C XML Query Algebra.