---
id: object/page/1237
type: object
title: Page 1237 "Transformation Rules"
summary: Page 1237 "Transformation Rules" in Base Application (System.IO). Present since at least BC23, still in BC30.
tier: official
language: en
tags:
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  - base application
versions:
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  last_changed: null
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review:
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    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/System/DataExchange/TransformationRules.Page.al
    title: src/Layers/W1/BaseApp/System/DataExchange/TransformationRules.Page.al (releases/29.x)
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object_type: page
object_id: 1237
name: Transformation Rules
namespace: System.IO
app: Base Application
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last_version: "30"
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---

# Page 1237 "Transformation Rules"

> Page 1237 "Transformation Rules" in Base Application (System.IO). Present since at least BC23, still in BC30.

Base Application · System.IO · BC23-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/System/DataExchange/TransformationRules.Page.al) · facts from BC29

## Properties

| Property | Value |
|---|---|
| Caption | Transformation Rules |
| SourceTable | Transformation Rule |
| PageType | List |
| UsageCategory | Administration |
| ApplicationArea | Basic, Suite |

## Fields on this page

Layout controls in source order, grouped by the container they sit in. Shows: the table field a control is bound to (or its expression as written); ToolTip: the control's own, else the bound field's (marked).

| Group | Control | Shows | ToolTip |
|---|---|---|---|
| Group | Code | [Code](../table/1237.md#fields) | Specifies rules for how text that was imported from an external file is transformed to a supported value that can be mapped to the specified field in Dynamics 365. |
|  | Description | [Description](../table/1237.md#fields) | Specifies rules for how text that was imported from an external file is transformed to a supported value that can be mapped to the specified field in Business Central. |
|  | Transformation Type | [Transformation Type](../table/1237.md#fields) | Specifies rules for how text that was imported from an external file is transformed to a supported value that can be mapped to the specified field in Business Central. |
|  | Find Value | [Find Value](../table/1237.md#fields) | Specifies rules for how text that was imported from an external file is transformed to a supported value that can be mapped to the specified field in Business Central. |
|  | Replace Value | [Replace Value](../table/1237.md#fields) | Specifies rules for how text that was imported from an external file is transformed to a supported value that can be mapped to the specified field in Business Central. |
|  | Start Position | [Start Position](../table/1237.md#fields) | Specifies rules for how text that was imported from an external file is transformed to a supported value that can be mapped to the specified field in Business Central. |
|  | Length | [Length](../table/1237.md#fields) | Specifies rules for how text that was imported from an external file is transformed to a supported value that can be mapped to the specified field in Business Central. |
|  | Data Format | [Data Format](../table/1237.md#fields) | Specifies rules for how text that was imported from an external file is transformed to a supported value that can be mapped to the specified field in Business Central. |
|  | Data Formatting Culture | [Data Formatting Culture](../table/1237.md#fields) | Specifies rules for how text that was imported from an external file is transformed to a supported value that can be mapped to the specified field in Business Central. |

## Triggers

OnOpenPage

## Relations

- card page [Page 1238 "Transformation Rule Card"](../page/1238.md)
- source table [Table 1237 "Transformation Rule"](../table/1237.md)

## Pages and codeunits on this table

- [Table 1237 "Transformation Rule"](../table/1237.md) (lookup page)

## Across versions

- Present in: BC23-30
- Changed (declaration) in: none

Source: AL metadata extracted from the code (names, ids, signatures, properties); no code bodies (D10).

## Ask your agent

Procedure bodies are not stored here (D10). For a procedure body or the calls of one procedure, ask bc-code-atlas (external, by Stefan Maron, MIT; default corpus w1-28), which the bc-observatory plugin connects: `bcatlas_resolve_node(object_type: "page", object_name: "Transformation Rules")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.