This tests whether
name is a legitimate tag to use as a
direct sub-element of the
element tag according to the
definition of the
element element in the specified DTD. This
is a generic function that dispatches on the element type, so that
different version take effect for
The name of the sub-element about which we are
querying the list of sub-tags within
An optional argument which, if supplied,
queries whether the
This is not intended to be called directly, but
indirectly by the
Logical value indicating whether the sub-element
can appear in an
element tag or not.
Duncan Temple Lang
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