32.4.2 Content model [ElementSets] settings
To specify groups of elements as the values for certain settings, content-model configuration files define sets of elements:
; Name for set = list of elements and element sets, separated by
*setname = element1 element2 *otherset
Set names start with “*”. Sets can include other sets. Included sets must be defined in [ElementSets] above the sets that include them. Within each set, the elements are alphabetical; that is for convenience in human look-up, and need not be preserved. They do have to be one line each; do not use an editor that wraps the lines in [ElementSets].
Each set has an alphanumeric name prefixed with an asterisk. Names of members of the set are listed to the right of the equals sign, separated by spaces. A member of an element set can be either of the following:
• the name of a previously defined element set.
This allows elements to be grouped for use on the right side of the equals sign in [TopicParents] and [TopicFirst], so that the same set of parents can be used in more than one setting.
Element sets are roughly equivalent to the parameter entities used in DTDs.
> 32 Working with content models > 32.4 Understanding content-model configurations > 32.4.2 Content model [ElementSets] settings