This section describes functions that facilitate creation and use of  immutable universally unique identifiers (UUID).

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For information about the uuid type inin Image Added, see Data Types(3.0).

uuidCreateFromHexString

This function takes a string representation of a UUID and converts it to the uuid type.

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uuid getUuid (string s) {
 uuid u = uuidCreateFromHexString(s);
 if(u==null) {
  //Incorrect UUID format
 } 
 return u;
} 

uuidCreateRandom

This function generates a random UUID.

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uuid getUuid() {
    return uuidCreateRandom();   
}

uuidGetVersion

This function returns the version of a UUID. The version number describes the type of the UUID, e g time-based, DCE security, name-based, and randomly generated UUID. For instance, a UUID generated by the function uuidCreateRandom is 4 (randomly generated UUID).

int uuidGetVersion ( uuid aUuid )

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uuid getUuid (string s) {
    uuid u = uuidCreateFromHexString(s);
    if(u==null) {
        debug("Incorrect UUID format");
    } else if (uuidGetVersion(u)<0) {
        debug("Invalid UUID");
    }
    return u;
}

uuidString

This function converts a UUID to a string. 

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uuid aUuid = uuidCreateRandom();
string s = (string) aUuid;

uuid aUuid = uuidCreateRandom();
string s = uuidString(aUuid);