If my understanding is correct, XDP is an open specification. You could build the ability to create XDP forms into your product just as other companies have developed tools that create and manipulate PDF (also an open spec).
Thank You, Jared for your answer. You are right that XDP and PDF are open specifications. My exactly question is Can it do XDP form without PDF packet in. And this XDP file include only XML to describe form, understanding from Adobe Reader!?
I didn't see any sample with XDP form only with XML...
I'm not sure that I understand your question. Are you asking whether Adobe Reader can open an XDP file and display it as a PDF even if there's no PDF packet in it? The short answer is no. You can convert an XDP to a PDF using Adobe LiveCycle Designer. If you want to convert to PDF at run time you need a server product - Adobe LiveCycle Forms.