This chapter specifies purpose, functional requirements, and metadata for the Data Types that are used in an M-Instance. They are grouped in three categories.
1 For location and time information
1.1 Address
| Purpose | The location of a storage facility. |
| Functional Requirements | The location is identified by a URL. |
1.1.2 Coordinates
| Purpose | A set of numbers representing Position in an M-Location. |
| Functional Requirements | Coordinates shall uniquely indicate a point in the space identified by the coordinate system. |
1.3 Orientation
| Purpose | The Euler angles indicating the rotation of an Object. |
| Functional Requirements | MPAI-MMM – Architecture assumes that the principal axis of an Object is the x axis, the y axis has an angle of 90˚ counterclockwise (right-to-left) with the x axis and its z axis points up toward a User viewing from above.
Orientation is expressed as an array of 3 rows and 3 columns: ϕ,θ,ψ 1st order time derivatives of ϕ,θ,ψ 2nd order time derivatives of ϕ,θ,ψ |
1.4 Point of View
| Purpose | The Spatial Attitude of a Persona watching a Scene. |
| Functional Requirements | Point of View shall express the Position of a Persona with an Orientation watching a Scene.
Portable Avatar Format defines the x,y,z of a body [6]. |
1.5 Position
| Purpose | The Coordinates of a point in an M-Environment using a Coordinate system. |
| Functional Requirements | Position is expressed as an array of 3 rows and 3 columns:
Cartesian: x,y,z 1st order time derivatives of x,y,z 2nd order time derivatives of x,y,z Spherical: r,ϕ,θ 1st order time derivatives of r,ϕ,θ 2nd order time derivatives of r,ϕ,θ |
1.6 Spatial Attitude
| Purpose | The Position and Orientation of an Entity, and their velocities and accelerations. |
| Functional Requirements | Spatial Attitude is expressed as an array of 6 rows and 3 columns:
Cartesian: x,y,z 1st order time derivatives of x,y,z 2nd order time derivatives of x,y,z or Spherical: r,ϕ,θ 1st order time derivatives of r,ϕ,θ 2nd order time derivatives of r,ϕ,θ and The Euler angles: α,β,γ 1st order time derivatives of α,β,γ 2nd order time derivatives of α,β,γ |
1.7 Time
| Purpose | The representation of the measure of time. |
| Functional Requirements | Time shall be able to express any value of time on the time axis. |
2 For Transactions
2.1 Amount
| Purpose | A number expressing a Value in a Currency. |
| Functional Requirements | The ability to express an Amount, e.g., a decimal number. |
2.2 Currency
| Purpose | A medium of exchange enabling Transactions in a M-Environment. |
| Functional Requirements | A Currency shall belong to a list of Currencies. |
3 For internal state information
3.1 Cognitive State
| Purpose | The representation of a User’s Personal Status that reflects the way they understand the context, such as “Confused”, “Dubious”, “Convinced”. |
| Functional Requirements | The ability to express a particular Cognitive State with a label from a dictionary of Cognitive States. |
3.2 Emotion
| Purpose | The representation of a User’s Personal Status that results from their interaction with a context, such as “Angry”, “Sad”, “Determined”. |
| Functional Requirements | The ability to express a particular Emotion with a label from a dictionary of Emotions. |
3.3 Social Attitude
| Purpose | The representation of a User’s Personal Status representing the way User intends to position vis-à-vis other Users, e.g., “Respectful”, “Confrontational”, “Soothing”. |
| Functional Requirements | The ability to express a particular Social Attitude with a label from a dictionary of Social Emotions. |
3.4 Personal Status
| Purpose | The representation of the information internal to a User characterising their behaviour. |
| Functional Requirements | Personal Status may include any of Cognitive State, Emotion, Social Attitude or none of them |
