Class: Offset - LinkML-Map

Configuration for calculating a value by applying an offset to a baseline value. The baseline value comes from the slot's populated_from field. This is commonly used for longitudinal data where measurements are recorded relative to a baseline. For example, calculating age_at_visit from age + (days * 1/365).

The calculation is: result = baseline ± (offset_value * offset_field_value) where baseline comes from populated_from.

URI: [linkmlmap:Offset](https://w3id.org/linkml/transformer/Offset)

 classDiagram
    class Offset
    click Offset href "../Offset/"
      Offset : offset_field

      Offset : offset_reverse

      Offset : offset_value

## Slots | Name | Cardinality and Range | Description | Inheritance | | --- | --- | --- | --- | | [offset_value](offset_value.md) | 1
[Float](Float.md) | Multiplier applied to the offset field value | direct | | [offset_field](offset_field.md) | 1
[String](String.md) | Name of the field in the source object that contains the offset amount | direct | | [offset_reverse](offset_reverse.md) | 0..1
[Boolean](Boolean.md) | If true, subtract the offset from the baseline (baseline - offset) | direct | ## Usages | used by | used in | type | used | | --- | --- | --- | --- | | [SlotDerivation](SlotDerivation.md) | [offset](offset.md) | range | [Offset](Offset.md) | ## Identifier and Mapping Information ### Schema Source * from schema: https://w3id.org/linkml/transformer ## Mappings | Mapping Type | Mapped Value | | --- | --- | | self | linkmlmap:Offset | | native | linkmlmap:Offset | ## LinkML Source ### Direct

name: Offset
description: 'Configuration for calculating a value by applying an offset to a baseline
  value. The baseline value comes from the slot''s populated_from field. This is commonly
  used for longitudinal data where measurements are recorded relative to a baseline.
  For example, calculating age_at_visit from age + (days * 1/365).

  The calculation is: result = baseline ± (offset_value * offset_field_value) where
  baseline comes from populated_from.'
from_schema: https://w3id.org/linkml/transformer
attributes:
  offset_value:
    name: offset_value
    description: Multiplier applied to the offset field value. For example, use 1/365
      (or 0.00273973) to convert days to years, or 1/12 (or 0.0833333) to convert
      months to years.
    from_schema: https://w3id.org/linkml/transformer
    rank: 1000
    domain_of:
    - Offset
    range: float
    required: true
  offset_field:
    name: offset_field
    description: Name of the field in the source object that contains the offset amount.
      This value will be multiplied by offset_value.
    from_schema: https://w3id.org/linkml/transformer
    rank: 1000
    domain_of:
    - Offset
    range: string
    required: true
  offset_reverse:
    name: offset_reverse
    description: If true, subtract the offset from the baseline (baseline - offset).
      If false, add the offset to the baseline (baseline + offset). Defaults to false
      (addition).
    from_schema: https://w3id.org/linkml/transformer
    rank: 1000
    domain_of:
    - Offset
    range: boolean

### Induced

name: Offset
description: 'Configuration for calculating a value by applying an offset to a baseline
  value. The baseline value comes from the slot''s populated_from field. This is commonly
  used for longitudinal data where measurements are recorded relative to a baseline.
  For example, calculating age_at_visit from age + (days * 1/365).

  The calculation is: result = baseline ± (offset_value * offset_field_value) where
  baseline comes from populated_from.'
from_schema: https://w3id.org/linkml/transformer
attributes:
  offset_value:
    name: offset_value
    description: Multiplier applied to the offset field value. For example, use 1/365
      (or 0.00273973) to convert days to years, or 1/12 (or 0.0833333) to convert
      months to years.
    from_schema: https://w3id.org/linkml/transformer
    rank: 1000
    owner: Offset
    domain_of:
    - Offset
    range: float
    required: true
  offset_field:
    name: offset_field
    description: Name of the field in the source object that contains the offset amount.
      This value will be multiplied by offset_value.
    from_schema: https://w3id.org/linkml/transformer
    rank: 1000
    owner: Offset
    domain_of:
    - Offset
    range: string
    required: true
  offset_reverse:
    name: offset_reverse
    description: If true, subtract the offset from the baseline (baseline - offset).
      If false, add the offset to the baseline (baseline + offset). Defaults to false
      (addition).
    from_schema: https://w3id.org/linkml/transformer
    rank: 1000
    owner: Offset
    domain_of:
    - Offset
    range: boolean