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Asked: 2026-05-25T23:49:16+00:00

I’m trying to validate a string in an xsd that requires the use of

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I’m trying to validate a string in an xsd that requires the use of a regex. The string will take the form of the following…

JOE~PETE~SAM~BOB

and the following are considered valid…

JOE
~PETE
JOE~SAM~
~~~BOB
JOE~PETE~~

also, each of the names between the ~ can only be a maximum of 6 characters (or digits) and there can only be a maximum of 4 names.

The regex I’m trying right now is…

[0-9a-zA-Z]{0,6}[~]{0,1}|[0-9a-zA-Z]{0,6}[~]{1}[0-9a-zA-Z]{0,4}[~]{0,1}

but am wondering if their is a better solution.

NOTE: I should clarify a bit further… if there are only 4 names allowed, that means there would only be 3 ~’s at the most allowed. The tildes denote position, so if ~~~BOB occurred, that would mean the position 1,2, and 3 were empty, and the 4th was occupied by BOB. Also, if the you had JOE~~~, JOE is in the first position, and the rest are empty. Zero or more names could be in any of the 4 positions. Also, symbols like .,*, space, and others are allowed.

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1 Answer

  1. Editorial Team

    i think this is what you’re getting at 

    ^[^~]{0,6}(~[^~]{0,6}){0,3}$
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