Fetch Value of XMP Structure Property Field

Ruby example to list the field names for a structure property.

Download Ruby Programming Example Scripts

# file: xmpFetchStructField.rb

require 'chilkat'

# Fetch the value of a single field within a structure property.
xmp = Chilkat::CkXmp.new()
success = xmp.UnlockComponent("Anything for 30-day trial")
if not success
	xmp.SaveLastError("errorLog.txt")
	exit
end

success = xmp.LoadAppFile("images/xmpExample.jpg")
if not success
	xmp.SaveLastError("errorLog.txt")
	exit
end

# How many embedded XMP documents in the image file?
numEmbedded = xmp.get_NumEmbedded()
if (numEmbedded == 0) 
	print "This JPG does not have embedded XMP metadata\n"
	exit
end

# Retrieve the 1st XMP document as a CkXml object.
# (There is usually only a single embedded XMP)
xml = xmp.GetEmbedded(0)

# Gets the CiAdrCity member of the CreatorContactInfo structure:
value = xmp.structValue(xml,"Iptc4xmpCore:CreatorContactInfo",
	"Iptc4xmpCore:CiAdrCity")

print "value = " + value + "\n"