Specifies whether to generate the list of elements that may substitute for the given element.
Typically, these are the members of the substitution group headed by the given element.

Note that the head of a substitution group may be a member of other substitution group (with a different head) and so on. Thereby, the subsitution groups may form an hierarchy.

So, the list of substituting elements may potentially include all members of the subsitution group hierarchy attached to the given element. However, that is not always the case. Some of those members may be abstract or blocked from substitutions by the setting of block attribute (specified in the given element or intemediate heads). Such members will be excluded from the list.

The list will appear under the heading "Can be substituted with elements".

Applies To:

Global Elements
See Also Parameters: