Right now, the behavior of the XLIFF loader is to use the content of the <source> element as the id, and not the id attribute of the <trans-unit> element. This creates problems for people that adhere to the specification where the id is meaningful.

For example:

<trans-unit id="form.label.firstname">
    <source>Firstname</source>
</trans-unit>

The loader would now take "Firstname" as id, and not "form.label.firstname" as you would expect. Since changing this would be a BC break, I'd like to know what others think about this?