XMP Array Property - Bag, Seq, or Alt

How to insert or update an XMP array property (bag, seq, or alt).

LOCAL loXmp
LOCAL lnSuccess
LOCAL loXml
LOCAL loSa

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

    *  Create an object to hold one or more string values.
    loSa = CreateObject('Chilkat.CkStringArray')
    loSa.Append("value_1")
    loSa.Append("value_2")
    *  ...

    lnSuccess = loXmp.AddArray(loXml,"bag","Iptc4xmpCore:Chilkat",loSa)
    IF (lnSuccess <> 1) THEN
        =MESSAGEBOX(loXmp.LastErrorText)
    ELSE
        *  Save the JPG.
        loXmp.SaveAppFile = loXmp S ("modified.jpg")

    ENDIF

    RELEASE loXml

ELSE
    =MESSAGEBOX(loXmp.LastErrorText)
ENDIF