(Tcl) Get a Structure Property Value from XMP

Demonstrates how to open a JPG or TIF image file, access the XMP metadata, and fetch the value of a structure property, such as the Iptc4xmpCore:CiTelWork (found within the Iptc4xmpCore:CreatorContactInfo structure).

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load ./chilkat.dll

# This requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

set xmp [new_CkXmp]

# Load a JPG or TIF image file.
# Sample JPG's with XMP metadata may be found at:
# http://www.chilkatsoft.com/testData/xmp/sample1.jpg
# http://www.chilkatsoft.com/testData/xmp/sample2.jpg
# http://www.chilkatsoft.com/testData/xmp/sample3.jpg
set success [CkXmp_LoadAppFile $xmp "sample1.jpg"]
if {$success != 1} then {
    puts [CkXmp_lastErrorText $xmp]
    delete_CkXmp $xmp
    exit
}

puts "Num embedded XMP docs: [CkXmp_get_NumEmbedded $xmp]"

# Assuming there is at least one, get the 1st.
# (There is typically never more than one, but theoretically it's possible.)
# xml is a CkXml
set xml [CkXmp_GetEmbedded $xmp 0]
if {[CkXmp_get_LastMethodSuccess $xmp] == 1} then {

    set propVal [CkXmp_getStructValue $xmp $xml "Iptc4xmpCore:CreatorContactInfo" "Iptc4xmpCore:CiTelWork"]
    if {[CkXmp_get_LastMethodSuccess $xmp] != 1} then {
        puts "Not found."
    }     else {
        puts "$propVal"
    }

    delete_CkXml $xml

} else {
    puts [CkXmp_lastErrorText $xmp]
}


delete_CkXmp $xmp