# Slot: backend 


_Execution backend this experiment runs on when no backend is passed explicitly (e.g. 'tvboptim', 'tvb', 'jax', 'julia', 'brian2'). Declares the engine the experiment requires — a spiking point-neuron network sets 'brian2', a mean-field model leaves it unset. run(format=...) and ``tvbo run --backend`` override it; when unset the default backend (tvboptim) is used._



<div data-search-exclude markdown="1">



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

| Name | Description | Modifies Slot |
| --- | --- | --- |
| [ExecutionConfig](../classes/ExecutionConfig.qmd) | Configuration for computational execution (parallelization, precision, hardwa... |  no  |






## Properties

### Type and Range

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

### Cardinality and Requirements

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

| Property | Value |
| --- | --- |
| Owner | [ExecutionConfig](../classes/ExecutionConfig.qmd) |












## Identifier and Mapping Information





### Schema Source


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




## Mappings

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




## LinkML Source

<details>
```yaml
name: backend
description: Execution backend this experiment runs on when no backend is passed explicitly
  (e.g. 'tvboptim', 'tvb', 'jax', 'julia', 'brian2'). Declares the engine the experiment
  requires — a spiking point-neuron network sets 'brian2', a mean-field model leaves
  it unset. run(format=...) and ``tvbo run --backend`` override it; when unset the
  default backend (tvboptim) is used.
from_schema: https://w3id.org/tvbo
rank: 1000
owner: ExecutionConfig
domain_of:
- ExecutionConfig
range: string

```
</details></div>