Visual user agents must ensure that the content of the Q element is rendered with delimiting quotation marks. Authors should not put quotation marks at the beginning and end of the content of a Q element.
User agents should render quotation marks in a language-sensitive manner (see the lang attribute). Many languages adopt different quotation styles for outer and inner (nested) quotations, which should be respected by user-agents.
John said, <Q lang="en-us">I saw Lucy at lunch, she told me
<Q lang="en-us">Mary wants you
to get some ice cream on your way home.</Q> I think I will get
some at Ben and Jerry's, on Gloucester Road.</Q>
Since the language of both quotations is American English, user agents should render them appropriately, for example with single quote marks around the inner quotation and double quote marks around the outer quotation:
John said, "I saw Lucy at lunch, she told me 'Mary wants you
to get some ice cream on your way home.' I think I will get some
at Ben and Jerry's, on Gloucester Road."