---
search:
boost: 10.0
---
# Class: SystemComposition
_Molecular composition of simulated system._
URI: [https://CCPBioSim.ac.uk/biosim-schema/SystemComposition](https://CCPBioSim.ac.uk/biosim-schema/SystemComposition)
```{mermaid}
classDiagram
class SystemComposition
click SystemComposition href "../../classes/SystemComposition/"
SystemComposition : molecule_ID
SystemComposition --> "*" MoleculeID : molecule_ID
click MoleculeID href "../../classes/MoleculeID/"
SystemComposition : system_counts
SystemComposition --> "0..1" SystemCounts : system_counts
click SystemCounts href "../../classes/SystemCounts/"
```
## Slots
| Name | Cardinality and Range | Description | Inheritance |
| --- | --- | --- | --- |
| [system_counts](../slots/system_counts.md) | 0..1
[SystemCounts](../classes/SystemCounts.md) | Entity counts across the simulated system | direct |
| [molecule_ID](../slots/molecule_ID.md) | *
[MoleculeID](../classes/MoleculeID.md) | Persistent identifier of a molecule being simulated | direct |
## Usages
| used by | used in | type | used |
| --- | --- | --- | --- |
| [SimulationMetadata](../classes/SimulationMetadata.md) | [composition](../slots/composition.md) | range | [SystemComposition](../classes/SystemComposition.md) |
## Identifier and Mapping Information
### Schema Source
* from schema: https://CCPBioSim.ac.uk/biosim-schema/
## Mappings
| Mapping Type | Mapped Value |
| --- | --- |
| self | https://CCPBioSim.ac.uk/biosim-schema/SystemComposition |
| native | https://CCPBioSim.ac.uk/biosim-schema/SystemComposition |
## LinkML Source
### Direct
```yaml
name: SystemComposition
description: Molecular composition of simulated system.
from_schema: https://CCPBioSim.ac.uk/biosim-schema/
slots:
- system_counts
- molecule_ID
```
### Induced
```yaml
name: SystemComposition
description: Molecular composition of simulated system.
from_schema: https://CCPBioSim.ac.uk/biosim-schema/
attributes:
system_counts:
name: system_counts
description: Entity counts across the simulated system.
from_schema: https://CCPBioSim.ac.uk/biosim-schema/
aliases:
- System Counts
rank: 1000
owner: SystemComposition
domain_of:
- SystemComposition
range: SystemCounts
inlined: true
molecule_ID:
name: molecule_ID
description: Persistent identifier of a molecule being simulated.
from_schema: https://CCPBioSim.ac.uk/biosim-schema/
aliases:
- Molecule ID
rank: 1000
owner: SystemComposition
domain_of:
- SystemComposition
range: MoleculeID
multivalued: true
inlined: true
maximum_cardinality: 20
```