*.ora

.ora, or the Open Raster format, is an interchange format. It was designed to replace *.psd as an interchange format, as the latter isn’t meant for that. Like *.kra it is loosely based on the Open Document structure, thus a ZIP file with a bunch of XMLs and PNGs, but where Krita’s internal file format can sometimes have fully binary chunks, .ora saves its layers as *.png making it fully open and easy to support.

该文件格式用于数据交换，体积较大，不适合用来在互联网上分享作品。

参见

开放栅格图像格式规范