![]() The scheme that is specified by a URI is defined by its prefix http, ftp, and file are well-known examples. To identify parts, the OPC specification leverages the extensibility of RFC 2396 (Uniform Resource Identifiers (URI): Generic Syntax) to define the pack URI scheme. The following figure illustrates this concept. ![]() The key elements of this model are packages and parts, where a package is a logical container for one or more logical parts. The pack URI scheme is used by the Open Packaging Conventions (OPC) specification, which describes a model for organizing and identifying content. This topic provides an overview of the scheme, covers how to construct pack URIs for a variety of scenarios, discusses absolute and relative URIs and URI resolution, before showing how to use pack URIs from both markup and code. To provide a consistent mechanism for identifying and loading these types of files from these locations, WPF leverages the extensibility of the pack URI scheme. Specifying the user interface (UI) to show when an application first starts.įurthermore, URIs can be used to identify and load files from a variety of locations, including the following: In Windows Presentation Foundation (WPF), uniform resource identifiers (URIs) are used to identify and load files in many ways, including the following:
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