Template:Infobox/lookup/doc

Usage
This is a subtemplate of infobox. Given an S-expression representation of a parsed customization table for the infobox, the name of an infobox-customization parameter, and a default value, it extracts the value of the named parameter from the S-expression or, if not found, returns the default value. This template is used by infobox/p1. This template does not need to know the master list of valid customization parameters, since parameter names are provided to it.