Text-based formats like XML and JSON are good if most of your data is strings, but storing numeric data in decimal strings is both inefficient and inaccurate. T

Text-based formats like XML and JSON are good if most of your data is strings, but storing numeric data in decimal strings is both inefficient and inaccurate. That's why I think that HTML is an appropriate use of XML-like markup but perhaps vector images would need a true binary version. However I agree with saagarjha that it is very easy to write code to emit SVG, which is nice.