The XML can store references to the binary chunks in standard formats though, alongside the vector shapes and filters. <svg viewBox="## ## ## ##"> <image

The XML can store references to the binary chunks in standard formats though, alongside the vector shapes and filters. <svg viewBox="## ## ## ##"> <image xlink:href="layer1.png" x="##" y="##" width="##" height="##"/> <image xlink:href="layer2.jpg" x="##" y="##" width="##" height="##"/> <rect x="##" y="##" width="##" height="##" fill="red"/> </svg> All that's left is to standardize a way to package it.