Restrictions on documents containing forms

This section describes the restrictions that apply with documents containing forms when you have not used the NoXFA or NoForms elements to flatten them.

When you assemble multiple documents that contain only Acrobat forms, the Assembler service retains all form fields by default. In general, there are no restrictions on the operations that the Assembler service can perform on documents containing Acrobat forms. However, if a document contains signature fields, certain operations may invalidate the signatures. (See Digital signatures.)

For an XFA-based document, assembly of multiple documents is permitted only if the base document is a static XFA document and none of the other documents have XFA forms or Acrobat forms. A dynamic XFA document cannot be assembled with any other documents. If any of these conditions are violated, an exception will be thrown.

In addition to assembly, static XFA documents have the following restrictions:

•	You can disassemble a static XFA document, but the result documents are not XFA documents.

•	Using the PageOverlay or PageUnderlay elements throws an exception.

•	Attempting to change the page size or rotation of a document or to transform the page contents throws an exception.

For unflattened dynamic XFA documents, no operations are permitted that modify the document, add content, change page properties, or the initial view. The following operations are permitted with dynamic XFA documents:

•	Query operations

•	Export operations (for example, exporting bookmarks, links, and annotations).

•	Specifying encryption

•	Removal of certification or usage rights

•	Saving as XDP

•	Disassembly (but the result documents are not XFA documents)

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