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).

LOCAL loXmp
LOCAL lnSuccess
LOCAL loXml
LOCAL lcPropVal


loXmp = CreateObject('Chilkat.Xmp')

lnSuccess = loXmp.UnlockComponent("Anything for 30-day trial.")
IF (lnSuccess <> 1) THEN
    =MESSAGEBOX(loXmp.LastErrorText)
    QUIT
ENDIF

*  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
lnSuccess = loXmp.LoadAppFile("sample1.jpg")
IF (lnSuccess <> 1) THEN
    =MESSAGEBOX(loXmp.LastErrorText)
    QUIT
ENDIF

? "Num embedded XMP docs: " + loXmp.NumEmbedded

*  Assuming there is at least one, get the 1st.
*  (There is typically never more than one, but theoretically it's possible.)

loXml = loXmp.GetEmbedded(0)
IF (NOT (loXml = NULL )) THEN

    lcPropVal = loXmp.GetStructValue(loXml,"Iptc4xmpCore:CreatorContactInfo","Iptc4xmpCore:CiTelWork")
    IF (lcPropVal = NULL ) THEN
        =MESSAGEBOX("Not found.")
    ELSE
        =MESSAGEBOX(lcPropVal)
    ENDIF

    RELEASE loXml

ELSE
    =MESSAGEBOX(loXmp.LastErrorText)
ENDIF