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This document defines formatting and style rules for HTML and CSS. It aims at improving collaboration, code quality, and enabling supporting infrastructure. It applies to raw, working files that use HTML and CSS, including GSS files. Tools are free to obfuscate, minify, and compile as long as the general code quality is maintained.

The Google Chart API returns a chart image in response to a URL GET or POST request. The API can generate many kinds of charts, from pie or line charts to QR codes and formulas. All the information about the chart that you want, such as chart data, size, colors, and labels, are part of the URL. (For POST requests, it's a little different, but don't worry about that now).