Phrases which do not appear in CSS 2.1 CR, Section 9.9 have a pink background. Where these phrases are based on information stated elsewhere in CSS 2.1 CR, the origin of this information is indicated. Phrases which have been added for clarification of the existing specification are coloured green. Phrases which correct errors in the existing specification are coloured red. Phrases which appear in CSS 2.1 CR, Section 9.9 but which have been moved are delimited with arrows. Where a reason for deletion is given this is indicated.