Descriptions
Each attribute and constraint object has a defined value. For attributes, this includes the unit, the type of value, and any associated equations. For constraints, the value is simply a boolean statement. These values can either be simple values, like strings or numbers, or complex mathematical relations involving values from other objects.
Special handling is applied when resolving values containing strings of TBD (To Be Determined). This can be useful during the early stages of model formation to not resolve errors when the value is still being defined.
Math Syntax
Standard mathematical operations can be used within attribute values to compute derived values or perform other simple calculations. The syntax for these operations follows standard mathematical conventions:
| Operation | Syntax |
|---|
| Multiplication | A * B |
| Division | A / B |
| Addition | A + B |
| Exponentiation | A ^ B |
| Minimum | min(A, B) |
| Maximum | max(A, B) |
| Comparison Operators | Syntax |
|---|
| Equal | == |
| Unequal | != |
| Smaller | < |
| Larger | > |
| Smaller or Equal | <= |
| Larger or Equal | >= |
Value Types
Attributes can have the following kind assoicated to a value, which handles how it is displayed or computed:
| Type | Description |
|---|
Boolean | Represents true or false values. Does not use a unit and clears any existing unit. |
Date | Used for date values. Does not use a unit and clears any existing unit. |
Number | Represents standard numeric values. Optionally includes a unit. |
String | Represents string values. Does not use a unit and clears any existing unit. |
Unit Referencing
Values can reference units inline, such as 10 kg, where the number is associated with the unit.
Object Referencing
To reference other objects within an equation, use the @ symbol followed by the object’s name. This will automatically resolve the object’s value and unit.
