Expand Set Code Block
You can define simple column expansions for individual tabular use, or specify an expand-set in the definitions block and reference it for use in multiple pages.
Here is a high level view of the syntax of an expand definition.
expand <label string> { <column> <column> ... }
Here is a high level view of an expand-set in a definitions block.
expand-set id = <string> { take-parameter <string> expand <label string> { <column> <column> ... } }
Here is a high level view of the expand-set referenced in a data page.
expand-set id = <string> { pass-parameter <string> <value> }
Here is a high level view of the column-set that uses an expand definition.
column-set id = <string> { take-parameter <string> <column> <column> { expand <label string> { <column> <column> ... } } }
See also What is a Definitions Block?