spec typo Content Hierarchy Region Mapping example code

foreach E in POSTORDER-TRAVERSE ( R )
        if CONTENT-ELEMENT? ( E ) and TEMPORALLY-ACTIVE? ( E )
          if EMPTY? ( E ) or REGION-OF ( E ) != R and
            then PRUNE ( E )

Doesn't seem right. It doesn't prune elements which are not temporally active.

Perhaps:

foreach E in POSTORDER-TRAVERSE ( R )
        if not CONTENT-ELEMENT? ( E ) or not TEMPORALLY-ACTIVE? ( E )
            then PRUNE ( E )
        if EMPTY? ( E ) or REGION-OF ( E ) != R and
            then PRUNE ( E )

Sean Hayes
Media Accessibility Strategist
Accessibility Business Unit
Microsoft

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