# AttributedTextFormatting.AttributeContainerProxy.Scoped A scoped proxy for a partially validated set of attributes. ``` @dynamicMemberLookup struct Scoped where Subscope : AttributeScope ``` ## Overview Exposes `Attribute` as read-write and all other attributes in the scope as read-only. The type automatically queries the underlying [`AttributedTextFormattingDefinition`](/documentation/SwiftUI/AttributedTextFormattingDefinition) to constrain values that are accessed. > Note: This is equivalent to an > ``doc://com.apple.SwiftUI/documentation/SwiftUI/AttributedTextFormatting/AttributeContainerProxy``, except it only > provides dynamic member lookup for attributes in a certain ``Subscope``. ## Topics ### Subscripts [`subscript(dynamicMember:)`](/documentation/SwiftUI/AttributedTextFormatting/AttributeContainerProxy/Scoped/subscript(dynamicMember:)) Access the value of the attribute to constrain. ## Relationships ### Conforms To [`Sendable`](/documentation/Swift/Sendable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)