# MarkupOrderedSet.ElementID The markup ID types supported in a markup ordered set. ``` enum ElementID ``` ## Topics ### Switching on element kind [`case shape(MarkupID)`](/documentation/PaperKit/MarkupOrderedSet/ElementID/shape(_:)) A shape markup element ID. [`case image(MarkupID)`](/documentation/PaperKit/MarkupOrderedSet/ElementID/image(_:)) An image markup element ID. [`case link(MarkupID)`](/documentation/PaperKit/MarkupOrderedSet/ElementID/link(_:)) A link markup element ID. [`case loupe(MarkupID)`](/documentation/PaperKit/MarkupOrderedSet/ElementID/loupe(_:)) A loupe markup element ID. [`case stroke(UUID)`](/documentation/PaperKit/MarkupOrderedSet/ElementID/stroke(_:)) A stroke element ID. ### Creating an element ID [`init(MarkupID)`](/documentation/PaperKit/MarkupOrderedSet/ElementID/init(_:)-5ja8j) Creates a new element ID from a markup ID. [`init(UUID)`](/documentation/PaperKit/MarkupOrderedSet/ElementID/init(_:)-5ykum) Creates a new element ID from a stroke UUID. ## Relationships ### Conforms To [`Equatable`](/documentation/Swift/Equatable) [`Sendable`](/documentation/Swift/Sendable) [`Decodable`](/documentation/Swift/Decodable) [`Encodable`](/documentation/Swift/Encodable) [`RawRepresentable`](/documentation/Swift/RawRepresentable) [`Hashable`](/documentation/Swift/Hashable) [`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)