protovis part 4: external data and animated labels
Point to an external data file
Open the bar chart file and in the head area, lets add a new script that loads an external data file. Notice the source URL doesn't have any http information. That's because we're going to use a relative link. This means that as long as the data file is in the same folder as the html file you're working on, Protovis will be able to use it.