Save category description in Moodle XML import/export

What is not saved?

At this format of import/export in not saved:

1. description of the imported/exported category,

2. description of parental category(categories).

Current XML structure

<question type="category">
 <category>
  <text> $course$ / [ Parent category name / ] Current category name </text>
 </category>
</question>

The amount of block [ Parent category name / ] can be more or equally to zero.

Proposed XML structure

<question type="category">

 <category>
     <text>$course$/My First Category</text>
 </category>

</question>