Slot: subject
The starting element of the relationship (e.g., an Item or ItemGroup).
URI: [odm:slot/subject](https://cdisc.org/odm2/slot/subject)
## Applicable Classes
| Name | Description | Modifies Slot |
| --- | --- | --- |
| [Relationship](../classes/Relationship.md) | A semantic link that defines connections between elements such as Items or ItemGroups, capturing relationships like "is the unit for" or "assesses seriousness of" | no |
## Properties
### Type and Range
| Property | Value |
| --- | --- |
| Range | [IdentifiableElement](../classes/IdentifiableElement.md) |
| Domain Of | [Relationship](../classes/Relationship.md) |
### Cardinality and Requirements
| Property | Value |
| --- | --- |
| Required | Yes |
### Slot Characteristics
| Property | Value |
| --- | --- |
| Owner | [Relationship](../classes/Relationship.md) |
## Identifier and Mapping Information
### Schema Source
* from schema: https://cdisc.org/dds
## Mappings
| Mapping Type | Mapped Value |
| --- | --- |
| self | odm:subject |
| native | odm:subject |
## LinkML Source
name: subject
description: The starting element of the relationship (e.g., an Item or ItemGroup).
from_schema: https://cdisc.org/dds
rank: 1000
owner: Relationship
domain_of:
- Relationship
range: IdentifiableElement
required: true