XSD: how to restrict number of characters in string type attribute?

Question

I have a question regarding adding restriction in my xml schema(xsd). I have a complex-type like:

Answer 1

You can restrict the string to a number of chars like this:

  
    3-char strings only
  
  
    
  

The xs:length in the above limits the length of the string to exactly 3 chars. You can also use xs:minLength and xs:maxlength, or both.

You can provide a pattern like so:

The above says, 4 chars, of any of a-z, A-Z. The xs:pattern is a regular expression, so go to town with it.

You can restrict the string to a particular set of strings in this way:

  
    ISO-4217 3-letter currency codes. Only a subset are defined here.