CODEWITHSUNDEEP
regexxsd
user2617417
user2617417

Reputation: 1

Regular expression in xsd

Could anyone please explain the following regular pattern means or what would be a valid value, I mean total how many character should be an so on. 

    < xsd:simpleType name="GuidType">
            <xsd:restriction base="xsd:string">
 <xsd:pattern value="[0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12}" />
                </xsd:restriction>
            </xsd:simpleType>

Thanks

Upvotes: 0

Views: 140

Answers (2)

lordkain
lordkain

Reputation: 3109

total regular expression 

[0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12}

Breaks up in

[0-9A-F]{8} > explains : 8 chars that would be in set 0123456789ABCDEF
-           > explains: match character -
[0-9A-F]{4} > explains : 4 chars that would be in set 0123456789ABCDEF
-           > ..
[0-9A-F]{4} > ..
-           > ..
[0-9A-F]{4} > ..
-           > ..
[0-9A-F]{12} > explains : 12 chars that would be in set 0123456789ABCDEF

Upvotes: 0

soapergem
soapergem

Reputation: 9989

This is what is called a GUID, commonly used in the "uniqueidentifier" type in SQL. It's a set of 5 groups of hexadecimal digits: a grouping of 8 digits, then a hyphen, then 4 digits, then a hyphen, then 4 digits again, then a hyphen, then 4 digits AGAIN, then a hyphen, then 12 digits. Hexadecimal digits are the numerals 0 through 9 and the letters A through F. Altogether (with hyphens included) this is a 36-digit string.

So for example, a valid string might look like this:

3B3AC4DC-3DEB-4241-99BD-5611A68C4CF3

Upvotes: 1

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