---
id: object/codeunit/3688
type: object
title: Codeunit 3688 "BOM Node"
summary: Codeunit 3688 "BOM Node" in Base Application (Microsoft.Inventory.BOM.Tree). 9 public procedures, 3 events. Present since at least BC23, still in BC30, changed in BC27.
tier: official
language: en
tags:
  - codeunit
  - base application
versions:
  introduced: null
  last_changed: "27"
  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: dc86fde1e732a5ddfc666028ffe624751879ae02f28953a083848db1c34dd0b6
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Inventory/BOM/Tree/BOMNode.Codeunit.al
    title: src/Layers/W1/BaseApp/Inventory/BOM/Tree/BOMNode.Codeunit.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
    t: null
    quote: null
links:
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object_type: codeunit
object_id: 3688
name: BOM Node
namespace: Microsoft.Inventory.BOM.Tree
app: Base Application
extends: null
first_version: "23"
last_version: "30"
present_in:
  - "23"
  - "24"
  - "25"
  - "26"
  - "27"
  - "28"
  - "29"
  - "30"
changed_in:
  - "27"
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
  fields: 0
  procedures: 14
  events: 3
  subscribers: 0
relations:
  out: 0
  referenced_by: 0
  pages: 0
  extended_by: 0
  event_subscribers: 1
  calls: 1
  called_by: 3
  implements: 0
---

# Codeunit 3688 "BOM Node"

> Codeunit 3688 "BOM Node" in Base Application (Microsoft.Inventory.BOM.Tree). 9 public procedures, 3 events. Present since at least BC23, still in BC30, changed in BC27.

Base Application · Microsoft.Inventory.BOM.Tree · BC23-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Inventory/BOM/Tree/BOMNode.Codeunit.al) · facts from BC29

## Events published

- `OnWriteToDatabase()` (integration)
- `OnReachedNode(ParentBomNode: Codeunit "BOM Node"; var Handled: Boolean)` (integration)
- `OnWriteToDatabaseOnProductionBOM(BOMNo: Code[20]; CalculateLowLevelCode: Integer)` (internal)
  - subscribers: [Codeunit 99000781 "Mfg. Calculate BOM Tree"](../codeunit/99000781.md) OnWriteToDatabaseOnProductionBOM

## Procedures

- `GetType(): Enum Microsoft.Manufacturing.ProductionBOM."Production BOM Line Type"`
- `GetNumber(): Code[20]`
- `GetLowLevelCode(): Integer`
- `CreateForItem(ItemNo: Code[20]; LowLevelCode: Integer; NewLowLevelCodeParam: Codeunit "Low-Level Code Parameter")`
- `CreateForProdBOM(ProdBOMNo: Code[20]; LowLevelCode: Integer; NewLowLevelCodeParam: Codeunit "Low-Level Code Parameter")`
- `IsInitialized(): Boolean`
- `GetKey(): Text`
- `TraversedDown()`
- `TraversedDown(FromParent: Codeunit "BOM Node")`

Plus 2 local procedures.

## Calls

From the extracted call graph of BC29 (graphify-al on the snapshot checkout): calls whose target is known from a declared type or an `Object::"Name"` argument. Interface dispatch and calls through events are not counted, so the list is not complete.

- [Codeunit 3689 "Low-Level Code Parameter"](../codeunit/3689.md) (2 calls: `TraversedDown → GetRunMode`, `TraversedDown → ShowDetails`)

## Called by

- [Codeunit 3687 "Low-Level Code Calculator"](../codeunit/3687.md) (14 calls: `AddChildToParent → GetKey`, `PopulateFromBOMComponents → CreateForItem`, `PopulateFromBOMComponents → GetKey`, …)
- [Codeunit 3684 "BOM Tree Node"](../codeunit/3684.md) (2 calls: `GetKey → GetKey`, `TraverseDown → TraversedDown`)
- [Codeunit 3683 "BOM Tree Impl."](../codeunit/3683.md) (1 call: `AddRelation → GetKey`)

## Across versions

- Present in: BC23-30
- Changed (declaration) in: BC27

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). The call sections above are our own, per object, from the BC29 call graph. 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: "codeunit", object_name: "BOM Node")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.