Question

Where can I find regular expressions for the datatypes defined in XSD?

The XSD specification includes regular expressions for the datatypes, however they doesn’t seem to be correct. For example, for xsd:float the suggested regular expression is (\+|-)?([0-9]+(\.[0-9]*)?|\.[0-9]+)([Ee](\+|-)?[0-9]+)?|(\+|-)?INF|NaN, which, however, matches even strings like “0.this is not a float”:

var floatRegex = /(\+|-)?([0-9]+(\.[0-9]*)?|\.[0-9]+)([Ee](\+|-)?[0-9]+)?|(\+|-)?INF|NaN/;
floatRegex.test("0.this is not a float"); # returns true

Am I missing something from the XSD specification? Is there other source of correct regular expressions for XSD datatypes (e.g., RegExLib.com doesn’t have them)?

Answer 1

If you don’t want to allow anything around, then add ^ at the beginning and $ at the end (with grouping):

^( regex )$

var floatRegex = /^((\+|-)?([0-9]+(\.[0-9]*)?|\.[0-9]+)([Ee](\+|-)?[0-9]+)?|(\+|-)?INF|NaN)$/; 
floatRegex.test("0.this is not a float"); # returns false