Problem :
There's no attribute in SVG to control if the imported image be auto-rotated as per its EXIF data. I created a SVG which has an image embedded in it. When i open it in browser its orientation is Portrait, while in InkScape or OpenOffice Text the orientation automatically changes to Landscape.

I am not knowledgeable about the Specification as a whole. Hence would request someone to fill-up any gaps here.

Found an answer here : stackoverflow.com/questions/40081858/why-is-image-rotated-in-svg

Similar discussion on HTML Spec :
whatwg/html#4495