DH100 Lecture Notes - Lecture 1: Unicode Input, Component-Based Software Engineering, Plain Text
8 Nov 2016
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The expanding character set: various small character sets, varying by manufacturer, the ascii: 7-bit, for 128 characters, sufficient for standard english standard. The modern user: the global village we interact with people all over the globe. We need to access the global character set: i. e. unicode: this means: We need to input any desired character. We need to output any desired character. There are two main ways to enter all the characters we need: e(cid:374)teri(cid:374)g (cid:858)other(cid:859) chara(cid:272)ters: Plain text commands: use standard characters, but let certain (cid:272)o(cid:373)(cid:271)i(cid:374)atio(cid:374)s (cid:271)e i(cid:374)terpreted as the desired (cid:858)other(cid:859) (cid:272)hara(cid:272)ters. Make the entry method do something different, accessing a different range of characters. Input method now refers to the particular software component, by virtue of what it does. Keyboard since the primary method of entering characters into a computer is through the keyboard. Internally, characters are just codes: visual appearance defined by glyphs, sets of glyphs are stored in fonts.
