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Export Data on an XFA form writes its data as Acrobat does: XML (the data alone, rooted at the form's root data node, its namespaces declared) or an XDP holding the whole datasets and a reference to the PDF (.xdp, a new format). Import Data takes an XDP, a datasets or data element, or a data document whose root is the form's root data node, and makes it the form's whole data, keeping data descriptions; a laid-out form is laid out again from it (rows added and removed) and its calculations run; XFDF, FDF and tables still go the AcroForm way. Undoable. Image fields are now buttons marked /PCXfaImage (no PDF action): the forms layer treats one as an image field, so clicking it (or form_set_image) picks a picture, which is kept in the data as base64 with its xfa:contentType, as Designer saves it, and the laid-out form shows it from there. xfa: replace_data, write_data_image (hostile content types cleaned, 32 MB cap), export_data, import_data (64 MB cap, the parser's node limit, self-closing data elements). engine: export routing by document kind, import routing by the file's root element, re-layout and calculation after the data changes outside the fields, the picture's content type from its bytes. UI: XML and XDP in the export dialog of an XFA form, .xdp in the import filter. Tool texts, README and parity (form.xfa-data) updated. Hardened after an adversarial review pass: the file's data is held as a tree and written with the packet's own namespace prefix (never its markup), every packet rewrite is parsed back before it is written, files capped at 16 MB and 64 levels (a tag scan before the recursive parser, also guarding the datasets parser), pictures at 8 MB and PNG/ JPEG/GIF only, the file's shape and root name checked, UTF-16 and ISO-8859-1 decoded, pictures into data groups refused, cleaned names for pictures, static forms empty the fields the file doesn't hold, more rows than the layout cap reported, one datasets stream per edit, and only image fields take pictures into the data.