---
id: object/codeunit/20297
type: object
title: Codeunit 20297 "Use Case Symbols Handler"
summary: Codeunit 20297 "Use Case Symbols Handler" in INTaxEngine (Microsoft.Finance.TaxEngine.UseCaseBuilder). 6 events, 10 event subscribers. Introduced in BC29, still in BC30.
tier: official
language: en
tags:
  - codeunit
  - intaxengine
versions:
  introduced: "29"
  last_changed: null
  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: 89b06f58e39b4815318270b8e6e8eeb23381d36852383a0853eb77be57d05326
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Apps/W1/INTaxEngine/app/TaxEngine-UseCaseBuilder/src/UseCase/codeunit/UseCaseSymbolsHandler.Codeunit.al
    title: src/Apps/W1/INTaxEngine/app/TaxEngine-UseCaseBuilder/src/UseCase/codeunit/UseCaseSymbolsHandler.Codeunit.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
    t: null
    quote: null
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object_type: codeunit
object_id: 20297
name: Use Case Symbols Handler
namespace: Microsoft.Finance.TaxEngine.UseCaseBuilder
app: INTaxEngine
extends: null
first_version: "29"
last_version: "30"
present_in:
  - "29"
  - "30"
changed_in: []
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
  fields: 0
  procedures: 27
  events: 6
  subscribers: 10
relations:
  out: 0
  referenced_by: 0
  pages: 0
  extended_by: 0
  event_subscribers: 0
  calls: 5
  called_by: 0
  implements: 0
---

# Codeunit 20297 "Use Case Symbols Handler"

> Codeunit 20297 "Use Case Symbols Handler" in INTaxEngine (Microsoft.Finance.TaxEngine.UseCaseBuilder). 6 events, 10 event subscribers. Introduced in BC29, still in BC30.

INTaxEngine · Microsoft.Finance.TaxEngine.UseCaseBuilder · BC29-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Apps/W1/INTaxEngine/app/TaxEngine-UseCaseBuilder/src/UseCase/codeunit/UseCaseSymbolsHandler.Codeunit.al) · facts from BC29

## Events published

- `OnFindScriptSymbolLookupOnBeforeTaxAttributeDeleteEvent(var ScriptSymbolLookup: Record "Script Symbol Lookup"; TaxAttribute: Record "Tax Attribute")` (integration)
- `OnFindUseCaseAttributeMappingOnBeforeTaxAttributeDeleteEvent(var UseCaseAttributeMapping: Record "Use Case Attribute Mapping"; TaxAttribute: Record "Tax Attribute")` (integration)
- `OnFindScriptSymbolLookupOnBeforeTaxComponentDeleteEvent(var ScriptSymbolLookup: Record "Script Symbol Lookup"; TaxComponent: Record "Tax Component")` (integration)
- `OnFindScriptSymbolLookupForPostingOnBeforeTaxComponentDeleteEvent(var ScriptSymbolLookup: Record "Script Symbol Lookup"; TaxComponent: Record "Tax Component")` (integration)
- `OnFindUseCaseComponentCalculationOnBeforeTaxComponentDeleteEvent(var UseCaseComponentCalculation: Record "Use Case Component Calculation"; TaxComponent: Record "Tax Component")` (integration)
- `OnFindUseCaseComponentCalculationForPostingOnBeforeTaxComponentDeleteEvent(var UseCaseComponentCalculation: Record "Use Case Component Calculation"; TaxComponent: Record "Tax Component")` (integration)

## Event subscriptions

- OnInitScriptSymbols subscribes to Codeunit "Script Symbols Mgmt." OnInitScriptSymbols
- OnInitSymbols subscribes to Codeunit "Script Symbol Store" OnInitSymbols
- OnGetLookupValue subscribes to Codeunit "Script Symbol Store" OnGetLookupValue
- OnGetSymbolDataType subscribes to Codeunit "Lookup Mgmt." OnGetSymbolDataType
- OnIsSourceTypeSymbolType subscribes to Page "Script Symbol Lookup Dialog" OnIsSourceTypeSymbolType
- OnGetTaxType subscribes to Codeunit "Script Symbols Mgmt." OnGetTaxType
- OnAfterInsertTaxUseCase subscribes to Table "Tax Use Case" OnAfterInsertEvent
- OnGetLookupSourceTableID subscribes to Codeunit "Lookup Mgmt." OnGetLookupSourceTableID
- OnBeforeTaxAttribtueDeleteEvent subscribes to Table "Tax Attribute" OnBeforeDeleteEvent
- OnBeforeTaxComponentDeleteEvent subscribes to Table "Tax Component" OnBeforeDeleteEvent

## Procedures

11 local procedures, no public ones.

## 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 20134 "Script Symbol Store"](../codeunit/20134.md) (8 calls: `GetTableAttributeValue → ApplyTableFilters`, `InitTaxAttributes → GetSymbolValue`, `InitTaxAttributes → InsertSymbolValue`, …)
- [Codeunit 20133 "Script Symbols Mgmt."](../codeunit/20133.md) (5 calls: `InsertTaxAttributes → InsertScriptSymbol`, `InsertTaxComponents → InsertScriptSymbol`, `InsertTaxRateColumns → InsertScriptSymbol`, …)
- [Codeunit 20235 "Use Case Data Type Mgmt."](../codeunit/20235.md) (4 calls: `InitTaxAttributes → GetAttributeDataTypeToVariableDataType`, `InitTaxColumn → GetAttributeDataTypeToVariableDataType`, `InsertTaxAttributes → GetAttributeDataTypeToVariableDataType`, …)
- [Codeunit 20369 "Archival Single Instance"](../codeunit/20369.md) (2 calls: `OnBeforeTaxAttribtueDeleteEvent → GetSkipTaxAttribute`, `OnBeforeTaxComponentDeleteEvent → GetSkipTaxComponent`)
- [Codeunit 20298 "Use Case Variables Mgmt."](../codeunit/20298.md) (1 call: `GetTableAttributeValue → GetTaxAttributeValue`)

## Across versions

- Present in: BC29-30
- 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). 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: "Use Case Symbols Handler")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.