Slot: identifier

True means that the key slot(s) uniquely identifies the elements. There can be at most one identifier or key per container

URI: [linkml:identifier](https://w3id.org/linkml/identifier) ## Applicable Classes | Name | Description | Modifies Slot | | --- | --- | --- | | [SlotDefinition](SlotDefinition.md) | an element that describes how instances are related to other instances | no | ## Properties ### Type and Range | Property | Value | | --- | --- | | Range | [Boolean](Boolean.md) | | Domain | [SlotDefinition](SlotDefinition.md) | | Domain Of | [SlotDefinition](SlotDefinition.md) | ### Cardinality and Requirements | Property | Value | | --- | --- | ### Slot Characteristics | Property | Value | | --- | --- | | Inherited | Yes | ## In Subsets * [SpecificationSubset](SpecificationSubset.md) * [MinimalSubset](MinimalSubset.md) * [BasicSubset](BasicSubset.md) * [RelationalModelProfile](RelationalModelProfile.md) ## Aliases * primary key * ID * UID * code ## Comments * identifier is inherited * a key slot is automatically required. Identifiers cannot be optional * a given domain can have at most one identifier * identifiers and keys are mutually exclusive. A given domain cannot have both ## See Also * [https://en.wikipedia.org/wiki/Identifier](https://en.wikipedia.org/wiki/Identifier) * [linkml:unique_keys](https://w3id.org/linkml/unique_keys) ## Identifier and Mapping Information ### Administrative Metadata **Rank:** 5 ### Schema Source * from schema: https://w3id.org/linkml/meta ## Mappings | Mapping Type | Mapped Value | | --- | --- | | self | linkml:identifier | | native | linkml:identifier | ## LinkML Source

name: identifier
description: True means that the key slot(s) uniquely identifies the elements. There
  can be at most one identifier or key per container
comments:
- identifier is inherited
- a key slot is automatically required.  Identifiers cannot be optional
- a given domain can have at most one identifier
- identifiers and keys are mutually exclusive.  A given domain cannot have both
in_subset:
- SpecificationSubset
- MinimalSubset
- BasicSubset
- RelationalModelProfile
from_schema: https://w3id.org/linkml/meta
see_also:
- https://en.wikipedia.org/wiki/Identifier
- linkml:unique_keys
aliases:
- primary key
- ID
- UID
- code
rank: 5
domain: slot_definition
inherited: true
domain_of:
- slot_definition
range: boolean