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In SMIL 2.1, <switch> nodes may be enclosed in <par>. See http://www.w3.org/TR/SMIL2/smil-timing.html#edef-par
In SMIL 2.1, <switch> nodes may be enclosed in <par>. See http://www.w3.org/TR/SMIL2/smil-timing.html#edef-par