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Clarify DataClassificationSet semantics #46266

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May 20, 2025
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Clarify DataClassificationSet semantics #46266

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4 changes: 4 additions & 0 deletions docs/core/extensions/data-classification.md
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Expand Up @@ -63,6 +63,10 @@ If you want to share your custom classification taxonomy with other apps, this c

<xref:Microsoft.Extensions.Compliance.Classification.DataClassificationSet> lets you compose multiple data classifications into a single set. This allows you classify your data with multiple data classifications. In addition, the .NET redaction APIs make use of a <xref:Microsoft.Extensions.Compliance.Classification.DataClassificationSet>.

> [!NOTE]
> Multiple data classifications going together as a <xref:Microsoft.Extensions.Compliance.Classification.DataClassificationSet> are treated as a single classification. You can think of it as a logical `AND` operation. For example,
if you configured redaction for data classified as a <xref:Microsoft.Extensions.Compliance.Classification.DataClassificationSet> of `PrivateInformation` and `SocialSecurityNumber`, it will not apply to data classified as only `PrivateInformation` or only `SocialSecurityNumber`.

## Create custom classification attributes

Create custom attributes based on your custom classifications. Use these attributes to tag your data with the right classification. Consider the following custom attribute class definition:
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