You can refer to the definitions of these terms. [1] It's best not to reinvent how these terms are used. There has been far too much of that, already. [1] ht

You can refer to the definitions of these terms. [1] It's best not to reinvent how these terms are used. There has been far too much of that, already. [1] http://www.unicode.org/glossary/ http://www.unicode.org/glossary/ PS Be prepared for a long read.