<dd style="margin-left: 5.0em">Makes the <b>EXPECT</b> conditions apply only if the specified variable is not defined.
<dt><b>IN-GROUP </b><i>tag</i>
<dd style="margin-left: 5.0em">Requires the <b>EXPECT</b> attribute to be in the specified group tag.
-<dt><b>OF-TYPE </b><i>tag[,tag,...]</i>
+<dt><b>OF-TYPE </b><i>tag[|tag,...]</i>
<dd style="margin-left: 5.0em">Requires the <b>EXPECT</b> attribute to use one of the specified value tag(s).
<dt><b>REPEAT-LIMIT </b><i>number</i>
<dd style="margin-left: 5.0em"><br>