Observable

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Observable are a list of (mostly) distinct concepts that may be used in a data model to build entity and associations.

An Observable is characterized by three things:

  1. GUID - the Globally Unique IDentifier is a critical part of the definition. Although this is the true identity of the Observable, this form of information is not terribly useful to a human user.
  2. Name - this is the label that helps a user understand what the observable is intended to represent
  3. Description - the name is not always sufficient so the description provides amplifying information to further clarify what the observable is intended to represent.

Single Observable Modeling

Single Observable Modeling is when the SDM, a DSDM, or a USM is developed to follow the Single Observable Constraint in Section J.7.1. The Single Observable Constraint limits Conceptual Entities to composing at most one element of a single Observable type. Models that follow the Single Observable Constraint provide a clearer understanding of Entities by reducing the likelihood of semantic information being embedded in the multiple composition of Observables. This is considered a data modeling best practice.

List of Observables

AbsorbedDoseRate

AbsorbedDose

Acceleration

AmountOfSubstance

Angle

AngularAcceleration

AngularJerk

AngularVelocity

Audio

Bias

CalendarTime

ChemicalConcentration

Color

ConfigurationState

Count

CountRate

DataRate

Density

Description

Distance

DoseEquivalent

Duration

DynamicViscosity

Efficiency

ElectricCapacitance

ElectricChargeDensity

ElectricCharge

ElectricCurrentDensity

ElectricCurrent

ElectricField

ElectricPotential

ElectricResistance

Energy

Extent

Force

Gain

GraphicsState

HealthState

Humidity

Identifier

Illuminance

Image

IndexOfRefraction

Irradiance

Jerk

Kind

KinematicViscosity

LuminousIntensity

MassFlowRate

Mass

Metric

Mode

Name

NonPhysicalAddress

OperationalState

Order

OrientationAcceleration

OrientationJerk

OrientationVelocity

Orientation

Polarization

Position

Power

Pressure

Probability

RadiantIntensity

Ratio

Resolution

ScalarAcceleration

ScalarArea

ScalarJerk

ScalarVolume

Sensitivity

Size

Speed

TemperatureDelta

Temperature

TemporalFrequency

TimeOfDay

Torque

Uncertainty

UniqueIdentifier

ValidityState

Velocity

Video