# Slot: equation_order 


_Order of the time derivative on the LHS. Default 1 means dx/dt = rhs (first-order ODE). Order 2 means d²x/dt² = rhs (second-order ODE), etc. Higher-order ODEs are automatically lowered to coupled first-order systems by backends like ModelingToolkit.jl via mtkcompile._



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URI: [tvbo:slot/equation_order](https://w3id.org/tvbo/slot/equation_order)
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## Applicable Classes

| Name | Description | Modifies Slot |
| --- | --- | --- |
| [StateVariable](../classes/StateVariable.qmd) |  |  no  |
| [FieldStateVariable](../classes/FieldStateVariable.qmd) |  |  no  |






## Properties

### Type and Range

| Property | Value |
| --- | --- |
| Range | [xsd:integer](http://www.w3.org/2001/XMLSchema#integer) |
| Domain Of | [StateVariable](../classes/StateVariable.qmd) |

### Cardinality and Requirements

| Property | Value |
| --- | --- |
### Slot Characteristics

| Property | Value |
| --- | --- |
| If Absent | `int(1)` |
| Owner | [StateVariable](../classes/StateVariable.qmd) |












## Identifier and Mapping Information





### Schema Source


* from schema: https://w3id.org/tvbo




## Mappings

| Mapping Type | Mapped Value |
| ---  | ---  |
| self | tvbo:equation_order |
| native | tvbo:equation_order |




## LinkML Source

<details>
```yaml
name: equation_order
description: Order of the time derivative on the LHS. Default 1 means dx/dt = rhs
  (first-order ODE). Order 2 means d²x/dt² = rhs (second-order ODE), etc. Higher-order
  ODEs are automatically lowered to coupled first-order systems by backends like ModelingToolkit.jl
  via mtkcompile.
from_schema: https://w3id.org/tvbo
rank: 1000
ifabsent: int(1)
owner: StateVariable
domain_of:
- StateVariable
range: integer

```
</details></div>