What sign of punctuation is allowed in file names?

I just learned that a file name can have a hyphen, but not a colon. If you type a colon when recording or to save as in Pages, the changes of the colon to a hyphen.

Finder warns you at least you cannot use 'punctuation', although you can use apostrophes, periods, parentheses, hyphens, etc..

But the Pages (5.6.2) will change the colon in a link without telling you. (I work from home and save a lot, a lot of files.)

What punctuation marks are not allowed in file names?

Or is it a more general which must be subject to another jurisdiction?

Thank you

Bill

Filenames can use Union or underscores. Semicolons are a delimiter (such as with the forward slash) in the underlying works so that their presence could cause confusion. In the same way stops can cause problems. Question marks may indicate the beginning of a sequence of script in the URL and should be avoided. Diacritics appear to work OK on a Mac, but if the files are likely to go to Windows or be part of a Web site, then there may be problems, so better avoided.

There are a few specific problems: Macs are not case-sensitive - file and file are of the same name. However some servers and in particular if the file is used for a Web site, are case-sensitive, so problems may arise; avoid having filenames no differentiated only by capitalization. And in the specific case of Web sites, or multimedia files online, spaces are not allowed in a URL, and should be avoided (there is no problem with local files).

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