This implies that you must encode your own binary data into the valid character set before embedding it into the XML document. Obviously, you then have to decode the data on the receiving side.

However, in order to be consistent with the analysis in Stokes, Davis, and Koch (1995), the four classification explanatory variables are coded as follows: data resp; keep id active center center2 ...

A binary digit, or bit, is the smallest unit of data in computing. All data (music, images, software) processed by a computer is stored in bits. Any data or instructions sent to the CPU must first ...