Add/Remove Structure Members

C++ XMP sample code to add, remove, or replace structure property members.

void XmpAddRemoveStructMembers(void)
    {
    // Add / Remove Structure Property Members
    CkXmp xmp;
    xmp.UnlockComponent("anything for 30-day trial");

    bool success = xmp.LoadAppFile("AgencyPhotographer-Example.jpg");
    if (!success)
	{
	xmp.SaveLastError("lastError.txt");
	return;
	}

    // Get the 1st XMP metadata document contained within the JPG.
    // (It is unusual to have more than a single XMP embedded in a JPG or TIFF)
    CkXml *xml = xmp.GetEmbedded(0);
    if (!xml)
	{
	printf("XMP not found!\n");
	return;
	}

    xmp.RemoveStructProp(*xml,"Iptc4xmpCore:CreatorContactInfo","Iptc4xmpCore:CiEmailWork");

    // Update if already exists:
    xmp.AddStructProp(*xml,"Iptc4xmpCore:CreatorContactInfo","Iptc4xmpCore:CiAdrCity","Chicago");

    // Add if does not already exist:
    xmp.AddStructProp(*xml,"Iptc4xmpCore:CreatorContactInfo","Iptc4xmpCore:Comments","Hello World!");

    // Create entirely new structure w/ 1st member if the structure does not yet exist.
    xmp.AddStructProp(*xml,"Iptc4xmpCore:MyCustumStruct","AbcXyz","1234");

    // Save the JPG with its updated XMP metadata.
    xmp.SaveAppFile("out.jpg");

    // Save the XMP to an XML file so we can review the changes in a text editor
    xml->SaveXml("newXmp.xml");

    delete xml;
    
    return;
    }