[iText-questions] Add new tag in XMP

[sonagi Kim]

Hi!
I'd like to extend my own tag(own defined schema) in XMP. As I know so far, XMP is able to use tags which users defined their schema.
But I don't know how to extend and use the user defined tag.
For example, to use the vCard elements I insert this namespace in xpacket, and insert some element with DC metadata and vCard.
But when I open the PDF by Acrobat, I cannot see any metadata information in Document Metadata window. If I use just DC Metadata, I can see metadata information properly. That is, I should do some work for using my own schema or using other schema.
I don't know whether iText library supports this function. Is it possible? if yes, how can I do?

Best Regards,

Ryan