1. GroupDocs.Metadata
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  5. GroupDocs.Metadata.Standards.Xmp
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  7. XmpPacketWrapper

XmpPacketWrapper

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XmpPacketWrapper class

Contains serialized XMP package including header and trailer. A wrapper consisting of a pair of XML processing instructions (PIs) may be placed around the rdf:RDF element.

public class XmpPacketWrapper : MetadataPackage, IXmpType

Constructors

Name Description
XmpPacketWrapper() Initializes a new instance of the XmpPacketWrapper class.
XmpPacketWrapper(XmpHeaderPI, XmpTrailerPI, XmpMeta) Initializes a new instance of the XmpPacketWrapper class.

Properties

Name Description
Count { get; } Gets the number of metadata properties.
HeaderPI { get; set; } Gets or sets the header processing instruction.
Item { get; } Gets the MetadataProperty with the specified name.
Keys { get; } Gets a collection of the metadata property names.
Meta { get; set; } Gets or sets the XMP meta.
MetadataType { get; } Gets the metadata type.
PackageCount { get; } Gets the number of packages inside the XMP structure.
Packages { get; } Gets array of XmpPackage inside XMP.
PropertyDescriptors { get; } Gets a collection of descriptors that contain information about properties accessible through the GroupDocs.Metadata search engine.
Schemes { get; } Provides access to known XMP schemas.
TrailerPI { get; set; } Gets or sets the trailer processing instruction.

Methods

Name Description
AddPackage(XmpPackage) Adds the package.
virtual AddProperties(Func<MetadataProperty, bool>, PropertyValue) Adds known metadata properties satisfying the specified predicate. The operation is recursive so it affects all nested packages as well.
ClearPackages() Removes all XmpPackage inside XMP.
Contains(string) Determines whether the package contains a metadata property with the specified name.
ContainsPackage(string) Determines whether package is exist in XMP wrapper.
virtual FindProperties(Func<MetadataProperty, bool>) Finds the metadata properties satisfying the specified predicate. The search is recursive so it affects all nested packages as well.
GetEnumerator() Returns an enumerator that iterates through the collection.
GetPackage(string) Gets package by namespace uri.
GetXmpRepresentation() Returns string contained value in XMP format.
RemovePackage(XmpPackage) Removes the specified package.
virtual RemoveProperties(Func<MetadataProperty, bool>) Removes metadata properties satisfying the specified predicate.
virtual Sanitize() Removes writable metadata properties from the package. The operation is recursive so it affects all nested packages as well.
virtual SetProperties(Func<MetadataProperty, bool>, PropertyValue) Sets known metadata properties satisfying the specified predicate. The operation is recursive so it affects all nested packages as well. This method is a combination of AddProperties and UpdateProperties. If an existing property satisfies the predicate its value is updated. If there is a known property missing in the package that satisfies the predicate it is added to the package.
virtual UpdateProperties(Func<MetadataProperty, bool>, PropertyValue) Updates known metadata properties satisfying the specified predicate. The operation is recursive so it affects all nested packages as well.

Remarks

Learn more

Examples

This example shows how to update XMP metadata properties.

using (Metadata metadata = new Metadata(Constants.GifWithXmp))
{
    IXmp root = metadata.GetRootPackage() as IXmp;
    if (root != null && root.XmpPackage != null)
    {
        // if there is no such scheme in the XMP package we should create it
        if (root.XmpPackage.Schemes.DublinCore == null)
        {
            root.XmpPackage.Schemes.DublinCore = new XmpDublinCorePackage();
        }
        root.XmpPackage.Schemes.DublinCore.Format = "image/gif";
        root.XmpPackage.Schemes.DublinCore.SetRights("Copyright (C) 2011-2022 GroupDocs. All Rights Reserved");
        root.XmpPackage.Schemes.DublinCore.SetSubject("test");

        if (root.XmpPackage.Schemes.CameraRaw == null)
        {
            root.XmpPackage.Schemes.CameraRaw = new XmpCameraRawPackage();
        }
        root.XmpPackage.Schemes.CameraRaw.Shadows = 50;
        root.XmpPackage.Schemes.CameraRaw.AutoBrightness = true;
        root.XmpPackage.Schemes.CameraRaw.AutoExposure = true;
        root.XmpPackage.Schemes.CameraRaw.CameraProfile = "test";
        root.XmpPackage.Schemes.CameraRaw.Exposure = 0.0001;

        // If you don't want to keep the old values just replace the whole scheme
        root.XmpPackage.Schemes.XmpBasic = new XmpBasicPackage();
        root.XmpPackage.Schemes.XmpBasic.CreateDate = DateTime.Today;
        root.XmpPackage.Schemes.XmpBasic.BaseUrl = "https://groupdocs.com";
        root.XmpPackage.Schemes.XmpBasic.Rating = 5;

        root.XmpPackage.Schemes.BasicJobTicket = new XmpBasicJobTicketPackage();

        // Set a complex type property
        root.XmpPackage.Schemes.BasicJobTicket.Jobs = new[]
        {
            new XmpJob
            {
                ID = "1",
                Name = "test job",
                Url = "https://groupdocs.com"
            },
        };

        // ... 

        metadata.Save(Constants.OutputGif);
    }
}

See Also

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