This command is being sent by the server to a subscriber whenever a node in the subscribed sub-tree is changing one of its attributes.

<subscription id> update <node id> <attribute> <value>

• The subscription id is the id of the node on which the subscription was originally made.
• The node id is the id of the new node.
• The attribute is a text referring one of the defined attributes.
• The value is a string which may be enclosed in double-quotes if it contains any white-space or special characters.