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Unicode blocks in ConTeXt (view source)
Revision as of 08:34, 25 October 2017
, 08:34, 25 October 2017no edit summary
A code block starts at a code point that is a multiple of 16. The number of code points in each block is also a multiple of 16. Thus, the hexadecimal representation of the first code point in a block is of the form ''pqrs''0, and that of the last code point in it is of the form ''tuvw''F, where ''p'', ''q'', ''r'', ''s'', ''t'', ''u'', and ''v'', are hexadecimal digits.
The Unicode standard gives every block a unique name that describes the common semantic nature of its code points. These names are case insensitive, and the hyphens, spaces, and underscores, in them are insignificant. For example, one can refer to the block whose Unicode name is <{{code>|Myanmar Extended-A</code> }} as <{{code>|myanmarextendeda</code>}}, <{{code>|MyanmarExtendedA</code>}}, or <{{code>|myanmar_extended_a</code>}}. ConTeXt chooses the first of these alternative styles for the names of blocks, as described below.
== ConTeXt names of Unicode blocks ==
== Usage of the blocks in ConTeXt ==
A typical use of Unicode blocks is in the definition of fallbacks for fonts that do not have the necessary glyphs. Sometimes, when writing a document in ConTeXt, one needs to typeset special symbols that are not available in the base font of the document. A '''fallback''' font is one that provides these missing symbols.
