---
id: object/page/1212
type: object
title: Page 1212 "Data Exch Line Def Card"
summary: Page 1212 "Data Exch Line Def Card" in Base Application (System.IO). Present since at least BC23, still in BC30.
tier: official
language: en
tags:
  - page
  - base application
versions:
  introduced: null
  last_changed: null
  deprecated: null
review:
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  by: null
  at: null
  flags: []
generated:
  at: "2026-10-11T00:31:51.816Z"
  pipeline: 0.2.0
  prompts: {}
  input_hash: 198fe0623eec5124365ec686ecdf952ae0d667c52eecd24800a0aa4a79fc18d2
evidence:
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    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/System/DataExchange/DataExchLineDefCard.Page.al
    title: src/Layers/W1/BaseApp/System/DataExchange/DataExchLineDefCard.Page.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
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    quote: null
links:
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object_type: page
object_id: 1212
name: Data Exch Line Def Card
caption: Line Definitions
namespace: System.IO
app: Base Application
extends: null
first_version: "23"
last_version: "30"
present_in:
  - "23"
  - "24"
  - "25"
  - "26"
  - "27"
  - "28"
  - "29"
  - "30"
changed_in: []
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
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  procedures: 0
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  controls: 5
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relations:
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---

# Page 1212 "Data Exch Line Def Card"

> Page 1212 "Data Exch Line Def Card" in Base Application (System.IO). Present since at least BC23, still in BC30.

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

## Properties

| Property | Value |
|---|---|
| Caption | Line Definitions |
| SourceTable | Data Exch. Line Def |
| PageType | Document |

## 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 |
|---|---|---|---|
| General | Data Exch. Def Code | [Data Exch. Def Code](../table/1227.md#fields) | Specifies a code that identifies the data exchange definition. |
|  | Code | [Code](../table/1227.md#fields) | Specifies the line in the file. |
|  | Name | [Name](../table/1227.md#fields) | Specifies the name of the mapping setup. |
|  | Column Count | [Column Count](../table/1227.md#fields) | Specifies how many columns the line in the bank statement file has. |
|  | Namespace | [Namespace](../table/1227.md#fields) | Specifies the namespace (uniform resource name (urn)) for a target document that is expected in the file for validation. You can leave the field blank if you do not want to enable namespace validation. |

## Triggers

OnAfterGetCurrRecord

## Relations

- source table [Table 1227 "Data Exch. Line Def"](../table/1227.md)

## 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: "Data Exch Line Def Card")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.