{Asbru: A Task-Specific, Intention-Based, and Time-Oriented Language for Representing Skeletal Plans}

Conference Paper

Skeletal plans are a powerful way to reuse existing domain-specific procedural knowledge. They are instantiated and refined dynamically over time. In the Asgaard project, we are investigating a set of tasks that support the design and the execution of skeletal plans by a human executing agent other than the original plan designer. The underlying requirement to develop task-specific problem-solving methods is a modeling language. We developed a time-oriented machine-readable language, called Asbru, to represent and to annotate durative skeletal plans based on the task-specific ontology. During the design phase of plans, Asbru allows to express durative actions and plans caused by durative states of an observed agent. We represent explicitly the intentions underlying these plans as temporal patterns to be maintained, achieved or avoided. The result is an uniformly represented and organized plan-specification library. During the execution phase an applicable plan is instantiated with distinctive arguments and state-transition criteria are added to execute and reason about different tasks.
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7th Workshop on Knowledge Engineering: Methods & Languages (KEML-97)
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