When you create an ordering for a particular language, consider the following features that provide proper collation of text according to natural language:
- Ordering priorities, which determine whether differences are treated as primary, secondary, or tertiary differences.
- Grouped characters, sequences of characters that are treated as single letters. For example, in Spanish ch is a grouped character; thus, cx is less than chx.
- Expanding characters, single letters that are treated as a sequence of characters. For example, in some versions of German ordering, the letter ä might be treated as the sequence ae.
- Ignored characters, which are ignored unless there are no other differences in the strings being compared. For example, in English blackbird is less than black-bird, which is less than blackbirds.
The way in which any specific character is collated is dependent on the natural language. When you create a new collation table, you must indicate the behavior for every character in the script.
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