Creating Missing Appearance Stream

I'm using the PDF Library to convert LiveCycle-generated PDFs to rasterized images (GIF, TIF, JPG, whatever). What I'm finding is that some data values for text boxes are missing their AP reference (BTW, I'm completely new to this PDF world so some of my terminology may be wrong - sorry). What I'm trying to do is use the PDF Library to go ahead and add the necessary appearance stream to the PDF so that the form data is not lost when I rasterize the image. Any help would be greatly appreciated.

I found the XFA specification here:
http://partners.adobe.com/public/developer/en/xml/xfa_spec_2_4.pdf
And as I'm really only trying to produce images I'm thinking I can easily read the data from the XFA strings and match them to fields in the AcroForm. Then all I have left to do is what I wanted to do originally- that is, create the AP entry.
Any ideas how I can go about doing that?

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I want to create a document with cascading 'popups'. Not the built-in text-only popup, but an annotation containing an appearance stream that defines text and images. I'm currently using widget annotations based on a pushbutton field.
Each page in my document has many citations that refer to other pages in the document. When a user hovers over the citation, I want a 'popup' to appear containing a depiction of the destination. However, as the destination will itself have citations, I also want the 'popup' to contain citations that the user can hover over, triggering another popup, etc. In this way, a user could navigate throughout the document without leaving the page or even clicking the mouse.
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Is there a way to use a statically defined appearance stream in a dynamically created annotation?
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Hi George, I've gotten named APs to work, and I expect hidden buttons will follow. Thank you very much!
Quick follow-up - I will have many documents embedded within the same pdf file, and some of these documents will contain identical popups. However, I don't want to store identical icons in each document on account of file size.
Instead, I'd like to store one instance of each icon for all documents in the file.
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camelstrike wrote:
Hi
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There are a couple of different ways to get the data. Reading it from inside a DataSink is perfectly fine...
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[http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/CustomPayload.html]
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