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Function: key llCreateKeyValue( string k, string v );

Start an asynchronous transaction to create a key-value pair associated with the given experience key using the given key and value.
Returns a handle (a key) that can be used to identify the corresponding dataserver event to determine if this command succeeded or failed.

• string k The key for the key-value pair
• string v The value for the key-value pair. Maximum 2047 characters, or 4095 if using Mono.

If the key already exists the dataserver will return a failure along with the error XP_ERROR_STORAGE_EXCEPTION.



The dataserver callback parameters are:

  • A key containing the handle returned from llCreateKeyValue
  • A string containing a comma-delimited list (cdl). llDumpList2String([ integer success ] + components);
String Components
• integer success A boolean specifying if the transaction succeeded (1) or not (0).
• integer error An XP_ERROR_* flag that describes why the operation failed.
• string value The value for the key-value pair. Maximum 2047 characters, or 4095 if using Mono. Note! This value may contain commas.


  • Attempting to create a key with llCreateKeyValue when that key already exist will return an error
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key trans;
    touch_start(integer total_number)
        trans = llCreateKeyValue("FOO", "BAR");
    dataserver(key t, string value)
        if (t == trans)
            // our llCreateKeyValue transaction is done
            integer result = (integer)llGetSubString(value, 0, 0);
            if (result == 1)
                // the key-value pair was successfully created
                llSay(0, "New key-value pair was created");
                // the key-value pair was not created
                integer error = (integer)(llGetSubString(value, 2, -1));
                llSay(0, "Key-value failed to create: " + llGetExperienceErrorMessage(error));

Deep Notes

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function key llCreateKeyValue( string k, string v );