---
id: object/tableextension/3999
type: object
title: Table extension 3999 "Reten. Pol. Setup Line Ext."
summary: Table extension 3999 "Reten. Pol. Setup Line Ext." in Base Application (System.DataAdministration), extends "Retention Policy Setup Line". 1 fields. Present since at least BC23, still in BC30, changed in BC24.
tier: official
language: en
tags:
  - tableextension
  - base application
versions:
  introduced: null
  last_changed: "24"
  deprecated: null
review:
  state: derived
  by: null
  at: null
  flags: []
generated:
  at: "2026-10-11T00:31:51.816Z"
  pipeline: 0.2.0
  prompts: {}
  input_hash: d9538855cd7ed83ff6445e8f3c5abe8c40a7a7c1a2633bd02f73f10fd105c55c
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/OtherCapabilities/RetentionPolicy/RetenPolSetupLineExt.TableExt.al
    title: src/Layers/W1/BaseApp/OtherCapabilities/RetentionPolicy/RetenPolSetupLineExt.TableExt.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
    t: null
    quote: null
links:
  learn: []
  objects:
    - object/table/3902
  features: []
  topics: []
  localizations: []
  videos: []
  posts: []
  guidelines: []
object_type: tableextension
object_id: 3999
name: Reten. Pol. Setup Line Ext.
namespace: System.DataAdministration
app: Base Application
extends: Retention Policy Setup Line
first_version: "23"
last_version: "30"
present_in:
  - "23"
  - "24"
  - "25"
  - "26"
  - "27"
  - "28"
  - "29"
  - "30"
changed_in:
  - "24"
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
  fields: 1
  procedures: 0
  events: 0
  subscribers: 0
relations:
  out: 1
  referenced_by: 0
  pages: 0
  extended_by: 0
  event_subscribers: 0
  calls: 0
  called_by: 0
  implements: 0
---

# Table extension 3999 "Reten. Pol. Setup Line Ext."

> Table extension 3999 "Reten. Pol. Setup Line Ext." in Base Application (System.DataAdministration), extends "Retention Policy Setup Line". 1 fields. Present since at least BC23, still in BC30, changed in BC24.

Base Application · System.DataAdministration · BC23-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/OtherCapabilities/RetentionPolicy/RetenPolSetupLineExt.TableExt.al) · facts from BC29

Extends [Retention Policy Setup Line](../table/3902.md).

## Fields

Explanation: the field's ToolTip in the code; without one, the ToolTip of a page control bound to the field (marked via the page); without that, its Caption (marked caption) when that differs from the name.

| No. | Name | Type | Explanation | Notes |
|---|---|---|---|---|
| 3999 | Keep Last Version | Boolean | Specifies whether to prevent the last archived version of a document from expiring. <small>via [Page extension 3997 "Reten. Pol. Setup Lines Ext."](../pageextension/3997.md)</small> | DataClassification CustomerContent |

## Relations

- extends [Table 3902 "Retention Policy Setup Line"](../table/3902.md)

## Across versions

- Present in: BC23-30
- Changed (declaration) in: BC24

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: "tableextension", object_name: "Reten. Pol. Setup Line Ext.")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.