Question : excel / powerpoint support

[frisch-raphael]

I'd be interested in creating a fork / making a PR with support for PowerPoint and Excel. I already made a PowerPoint and Excel template engine for this tool a few years ago, but with a vastly different approach. At that time, the strategy was to turn the OpenXML into an XSLT and compile the document through an XSLT transform. Skimming through easy-template-x, I can see that the "compilation" is done by hand.

Have you already thought of adding support for PowerPoint and Excel? If so, do you have any thoughts on how to do that, while keeping the philosophy of the already existing docx templating code? The similarities between the office formats make me think it should not be impossible, but I'm sure I'm missing tons of details.