This function takes a list of strings and builds a URL to the PX-web API in reverser order.
buildPath(varname, topnodes = NULL, baseURL, ...)
A character string or a list of strings of the variable(s) in the web API. This can be a data node or a tree node.
A string or a list of strings containing the top nodes in top-to-bottom order
The base URL to use, depending on the web service.
Further arguments passed to base_url()
.