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Would you like to answer one of these unanswered questions instead?slanted-edge algorithms for calculating MTF/SFR are based on ISO 12233 standard, “Photography – Electronic still picture cameras – Resolution measurements”.Although this seems like a trivial question, I am quite sure it is not :) I need to validate names and surnames of people from all over the world. If it were only English ones I think that this would cut it: I doubt that this is feasible - there are just to much Unicode symbols to exclude all unwanted symbols (and how will tell you what Chinese symbols to exclude?) and there are surly to many valid symbols to inlcude them all (and you will have Chinese symbols problem again).If stopping XSS was a simple as finding a magic regex, a lot of us would be out of jobs.
A very contentious subject that I seem to have stumbled along here.
And that change is initiated by the value itself as it contains particular character sequences that mark the end of the one and the start of the other context.
Just like the So it suffices if you just escape the language and context dependent meta characters (those with the special meaning in that language and context) to get them be treated as literals and not as meta characters.
I'll try to give a proper answer myself: The only punctuations that should be allowed in a name are full stop, apostrophe and hyphen. This would sum up to this regex: Sorry, you're still going to leave valid names out in the cold. Hi John, the regex does support diacritics (arabic is also in the test cases) with the \p. in your example those would be "John W." (or "John" and "W.") and "Saunders". In case (1), you can allow all characters because you're checking against a paper document.
I haven't seen any other case in the list of corner cases. I strongly suggest you read up on diacritics in Arabic, especially those are separate Unicode characters but which combine with letters to change them. In case (2), you may as well allow all characters because "123 456" is really no worse a pseudonym than "Abc Def". Trying to get every umlaut, accented e, hyphen, etc. Just exclude digits (but then what about a guy named "George Forman the 4th") and symbols you know you don't want like @#$%^ or what have you.I would not put any constraints on a user name - it may even contain numbers; think of aristocratic names. No matter what regex you come up with, I can find a name somewhere in the world that will break it.