Basic concept

First of all, it is really important to understand the components and how it works together. The use of Tasc assumes that the spatial parts of authoring, e.g., locating Terminuses and Interfaces in virtual environment, are done beforehand.

Tasc

Tasc is a basic component and a single step of a scenario, following a simple syntax below:

goal: high-level task description
given: input
startWhen: condition that initiates Tasc
actor: intelligent terminus who performs Tasc
act: a static or dynamic action to accomplish goal
guidedBy: instruction guiding actor
endWhen: condition that terminates Tasc and triggers leadTo
produce: output being generated as an outcome of act
leadTo: flow of scoring, feedback, and transition to next Tasc

Tasc has two basic states, hasPerformed and isDone.

Scenario

A scenario is a consequences of Tascs, which will eventually turn into a linked list.

Terminus

Terminus is a object has physical properties of a location and a bounding area, and

• has state
• might represent spatial knowledge
• might perform action
• can be a subject of Instruction

Action

Action is a dynamic behaviour of Terminus that produce State or data. Some action has target of the action which is Terminus type. Action can be interpreted as a motor skill of a user to be performed at Tasc. The measurement for performance evaluation can be taken from Action.

Condition

Condition is a deterministic criteria triggered by a range of State change. For example until states the termination condition of Tasc. To be more specific until performs as a trigger that the termination condition should be checked where the actual validation of the condition is performed by then.

Instruction

Instruction transfers Information to Terminus through single or multiple Interfaces. A Tasc can have multiple instructions for the multimodal interaction. It aims to guide a human user as a Terminus to accomplish the goal of the Tasc through multimodal interfaces. For the case of Terminus as autonomous agent it can be used to inform its state or progress to human observers.

Context

Context is a description of prerequisite. Currently supported as a list of strings.

Flow

Flow is post processing of Tasc to control the flow afterward and consists of three parts: Evaluation, Feedback, and link to the next Tasc. Evaluation can be made through an equation with the measurements as variables resulting a float value. Feedback then shows effects corresponding the score, which represents the user’s performance through either a positive or negative way. Flow also provides link to the next Tasc based on the evaluation score.

Interface

Interface is a tool to represent Information with a sensory modality (such as visual, auditory, haptic, and others).