| /// This is Big5 with HKSCS with mappings to more recent Unicode assignments |
| /// instead of the Private Use Area code points that have been used historically. |
| /// It is believed to be able to decode existing Web content in a way that makes |
| /// sense. |
| /// |
| /// To avoid form submissions generating data that Web servers don't understand, |
| /// the encoder doesn't use the HKSCS byte sequences that precede the unextended |
| /// Big5 in the lexical order. |
| /// |
| /// [Index visualization](https://encoding.spec.whatwg.org/big5.html), |
| /// [Visualization of BMP coverage](https://encoding.spec.whatwg.org/big5-bmp.html) |
| /// |
| /// This encoding is designed to be suited for decoding the Windows code page 950 |
| /// and its HKSCS patched "951" variant such that the text makes sense, given |
| /// assignments that Unicode has made after those encodings used Private Use |
| /// Area characters. |
