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Please note that Aspose.Pdf for .NET supports the feature to convert Tagged PDF file to XML format. The Tagged PDF is very common PDF so you can use your own documents.
The easy way to check if the PDF is Tagged or not :- Open PDF in Acrobat Reader: File -> Document Properties -> Description (first bookmark), then if you look at bottom left corner of that dialog you will see “Tagged PDF: Yes/No”.
Nevertheless, the feature to convert un-tagged PDF file to XML format is logged as PDFNEWNET-34332 in our issue tracking system. As soon as the feature becomes available, we would be more than happy to update you with the status of correction. Please be patient and spare us little time. We are sorry for this inconvenience.