Class: KeyVal

A generic key-value pair.

URI: [linkmlmap:class/KeyVal](https://w3id.org/linkml/transformer/class/KeyVal) 
 classDiagram
    class KeyVal
    click KeyVal href "../../classes/KeyVal/"
      KeyVal : key

      KeyVal : value





        KeyVal --> "0..1" Any : value
        click Any href "../../classes/Any/"
## Slots | Name | Cardinality and Range | Description | Inheritance | | --- | --- | --- | --- | | [key](../slots/key.md) | 1
[String](../types/String.md) | The key | direct | | [value](../slots/value.md) | 0..1
[Any](../classes/Any.md) | The value associated with the key | direct | ## Usages | used by | used in | type | used | | --- | --- | --- | --- | | [TransformationSpecification](../classes/TransformationSpecification.md) | [prefixes](../slots/prefixes.md) | range | [KeyVal](../classes/KeyVal.md) | | [ElementDerivation](../classes/ElementDerivation.md) | [value_mappings](../slots/value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [ElementDerivation](../classes/ElementDerivation.md) | [expression_mappings](../slots/expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [ElementDerivation](../classes/ElementDerivation.md) | [expression_to_value_mappings](../slots/expression_to_value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [ElementDerivation](../classes/ElementDerivation.md) | [expression_to_expression_mappings](../slots/expression_to_expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [ClassDerivation](../classes/ClassDerivation.md) | [value_mappings](../slots/value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [ClassDerivation](../classes/ClassDerivation.md) | [expression_mappings](../slots/expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [ClassDerivation](../classes/ClassDerivation.md) | [expression_to_value_mappings](../slots/expression_to_value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [ClassDerivation](../classes/ClassDerivation.md) | [expression_to_expression_mappings](../slots/expression_to_expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [ObjectDerivation](../classes/ObjectDerivation.md) | [value_mappings](../slots/value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [ObjectDerivation](../classes/ObjectDerivation.md) | [expression_mappings](../slots/expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [ObjectDerivation](../classes/ObjectDerivation.md) | [expression_to_value_mappings](../slots/expression_to_value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [ObjectDerivation](../classes/ObjectDerivation.md) | [expression_to_expression_mappings](../slots/expression_to_expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [SlotDerivation](../classes/SlotDerivation.md) | [value_mappings](../slots/value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [SlotDerivation](../classes/SlotDerivation.md) | [expression_mappings](../slots/expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [SlotDerivation](../classes/SlotDerivation.md) | [expression_to_value_mappings](../slots/expression_to_value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [SlotDerivation](../classes/SlotDerivation.md) | [expression_to_expression_mappings](../slots/expression_to_expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [EnumDerivation](../classes/EnumDerivation.md) | [value_mappings](../slots/value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [EnumDerivation](../classes/EnumDerivation.md) | [expression_mappings](../slots/expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [EnumDerivation](../classes/EnumDerivation.md) | [expression_to_value_mappings](../slots/expression_to_value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [EnumDerivation](../classes/EnumDerivation.md) | [expression_to_expression_mappings](../slots/expression_to_expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [PermissibleValueDerivation](../classes/PermissibleValueDerivation.md) | [value_mappings](../slots/value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [PermissibleValueDerivation](../classes/PermissibleValueDerivation.md) | [expression_mappings](../slots/expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [PermissibleValueDerivation](../classes/PermissibleValueDerivation.md) | [expression_to_value_mappings](../slots/expression_to_value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [PermissibleValueDerivation](../classes/PermissibleValueDerivation.md) | [expression_to_expression_mappings](../slots/expression_to_expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [PrefixDerivation](../classes/PrefixDerivation.md) | [value_mappings](../slots/value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [PrefixDerivation](../classes/PrefixDerivation.md) | [expression_mappings](../slots/expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [PrefixDerivation](../classes/PrefixDerivation.md) | [expression_to_value_mappings](../slots/expression_to_value_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | | [PrefixDerivation](../classes/PrefixDerivation.md) | [expression_to_expression_mappings](../slots/expression_to_expression_mappings.md) | range | [KeyVal](../classes/KeyVal.md) | ## Identifier and Mapping Information ### Schema Source * from schema: https://w3id.org/linkml/transformer ## Mappings | Mapping Type | Mapped Value | | --- | --- | | self | linkmlmap:KeyVal | | native | linkmlmap:KeyVal | ## LinkML Source ### Direct 
name: KeyVal
description: A generic key-value pair.
from_schema: https://w3id.org/linkml/transformer
attributes:
  key:
    name: key
    description: The key.
    from_schema: https://w3id.org/linkml/transformer
    rank: 1000
    key: true
    domain_of:
    - KeyVal
  value:
    name: value
    description: The value associated with the key.
    from_schema: https://w3id.org/linkml/transformer
    domain_of:
    - SlotDerivation
    - KeyVal
    range: Any
### Induced 
name: KeyVal
description: A generic key-value pair.
from_schema: https://w3id.org/linkml/transformer
attributes:
  key:
    name: key
    description: The key.
    from_schema: https://w3id.org/linkml/transformer
    rank: 1000
    key: true
    owner: KeyVal
    domain_of:
    - KeyVal
    required: true
  value:
    name: value
    description: The value associated with the key.
    from_schema: https://w3id.org/linkml/transformer
    owner: KeyVal
    domain_of:
    - SlotDerivation
    - KeyVal
    range: Any