WD-CSS21-20020802 section 3, "Conformance: Requirements and Recommendations", editorial suggestions

Following is an editorial suggestion for section 3, "Conformance:
Requirements and Recommendations"
(<http://www.w3.org/TR/2002/WD-CSS21-20020802/conform.html>), of the
Cascading Style Sheets level 2.1 draft
(<http://www.w3.org/TR/2002/WD-CSS21-20020802>).



3.1 Definitions


"Content
The content associated with an element in the source document; not all
elements have content in which case they are called empty."

Change the sentence to "The content associated with an element in the
source document.  Some elements have no content, in which case they are
called empty."