What is the sort order used Finder?

I did a little research on this issue and found that (unless I'm missing something), the sort order of the Finder is not what it is supposed to be.

The only requirement that I found is this note archived tech how Finder lists items that are sorted by name (Mac OS X) from 2012.

In fact, almost everything what he described how Finder behaves, with the exception of the note at the bottom:

Technically speaking, the Finder sort is based on the Unicode snack Algorithm, defined by the Unicode Consortium. This standard provides an order for all characters in Unicode sorting complete and unambiguous

And that complicates matters, since (for example) the underscore character (officially called "bass line"), which sorts upwards and so before all alphanumeric value Unicode of U005F, which lies between the uppercase and lowercase Latin letters: 'Z' is U005A and 'a' corresponds to U0061.

The reason I ask is because I would like to find a character that sorts after all Latin characters.  Many sort to before, including < space >, stress / < low line > and (my favorite for folders) < pointing right angle double quote > (i.e. "'").

If it was really sort by Unicode, then it would be simple to use the selector of characters to insert a Unicode character value, such as U25B9, which is "▹.  "But we sort after space <>, < low line >, and" ' ", but before all Latin characters.

I found an abstract character who works here for this, but I am helpless about the why.  U1400 is the Unicode section called "Unified Canadian Aboriginal syllable", and U1433, the "Canadian syllable Po", is a character who appears in the Finder as a very big plus of symbol: "ᐳ." (More than the symbol is ' > ' for comparison.)

Yes WHY?

Why think the Finder that's good (partial) order:

U0020 "" (space)

U005F '_' (bass line) < underscore >

"U00BB '" ' (pointing to the right angle double quote)

U005C "------" (Reverse Solidus) < backslash >

U25B7 "▷" (white triangle pointing to the right)

U0041 "A".

U007A 'z '.

U1433 "ᐳ" (Canadian syllable Po)

Note: I see that note technical I linked to refers to the "Unicode snack Algorithm", which could indicate the answer somewhere in its depths.  If this is the case, then I guess this raises the question of why the Unicode coalition choose such an unexpected algorithm.

Your "Note" has the answer.  Sorting of Unicode is not determined by the values of code as such point, it is determined by the algorithm.  This can be quite complex, but I think an easy way of having things to sort after Latin is to use a Greek character as µ (m option).

http://Unicode.org/charts/collation/

Tags: Mac OS & System Software

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