We currently have Aspose.Words for java and are using it to merge several docx files into one docx file. It is possible to append a pptx file to a docx file? If not, would buying Aspose.Slides help accomplish this? Would the slides be appended as images in the word file? Thanks.
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I am afraid currently you cannot directly merge PPTX file to DOC/DOCX file but as a workaround, you can consider Converting Presentation to PDF using Aspose.Slides for Java and then Convert PDF to DOC or DOCX format using Aspose.Pdf for Java.
Once you have DOC/DOCX files, please merge them using Aspose.Words for Java by following instructions specified over