24: A conforming printer MUST NOT treat [an] attribute [marked as may] as an error[: xml:lang ]
Tests for assertions 24
table xml:lang
headingheading
cell cell

caption xml:lang
headingheading
cellcell

tr xml:lang
headingheading
cellcell

th xml:lang
headingcell
cellcell

td xml:lang
headingheading
cellcell