9.2.180 @xml:space Space

When printing or displaying the associated element, all white space (such as tabs, ordinary spaces, and line breaks) should be preserved.

In elements <code>, <glyph-data>, and <preformat>, this attribute must have the value preserve (as given below).

Value	Meaning
preserve	White space should be preserved. (This value is fixed and cannot be changed in a document.)

In element <inline-code>, this attribute will be assigned the value preserve by default.

Value	Meaning
default	Processing system (rather than the XML document) determines whether space is preserved or not.
preserve	White space should be preserved.