W3TPL/tags/get

About

 * Action: Tag is replaced by the value of a variable or expression.
 * Options:
 * arg: get value from http request named name instead of using stored variable
 * Retrieves value from $wgRequest->getVal(name, default)
 * This is somewhat obsolete; it is better to use the sysdata syntax
 * codes: process with ShowHTML before output
 * default= default value to use if argument named arg is not set
 * This may eventually be used to fill in a value in other cases, but for now it doesn't.
 * index= treats name as an array, and specifies the element to use
 * isolate: use extreme isolation to prevent parsing before output
 * lcase: convert to lowercase before output
 * len= maximum number of characters to include; truncate after nth character
 * name= name of variable to retrieve
 * raw: output should not be parsed (usage is restricted)
 * ucase: convert to uppercase before output
 * val= expression to use instead of variable name