# init(resolvingBookmarkData:options:relativeTo:bookmarkDataIsStale:) Initializes a newly created NSURL that points to a location specified by resolving bookmark data. ``` convenience init(resolvingBookmarkData bookmarkData: Data, options: NSURL.BookmarkResolutionOptions = [], relativeTo relativeURL: URL?, bookmarkDataIsStale isStale: UnsafeMutablePointer?) throws ``` ## Parameters `bookmarkData` The bookmark data the URL is derived from. `options` Options taken into account when resolving the bookmark data. `relativeURL` The base URL that the bookmark data is relative to. `isStale` If , the bookmark data is stale. ## Return Value An NSURL initialized by resolving `bookmarkData`. ## Discussion > Handling Errors in Swift: > In Swift, this method returns a nonoptional result and is marked with the `throws` keyword to indicate that it throws an error in cases of failure. > > You call this method in a `try` expression and handle any errors in the `catch` clauses of a `do` statement, as described in [Error Handling](https://docs.swift.org/swift-book/LanguageGuide/ErrorHandling.html) in [The Swift Programming Language](https://docs.swift.org/swift-book/) and `About Imported Cocoa Error Parameters`. --- 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)