Template:Infobox test/doc

Examples
Notice how the row doesn't appear in the displayed infobox when a label is defined without an accompanying data cell, and how all of them are displayed when a header is defined on the same row as a data cell. Also notice that subheaders are not bold by default like the headers used to split the main data section, because this role is meant to be for the above cell :

For this example, the bodystyle and labelstyle parameters are used to adjust the infobox width and define a default width for the column of labels: