Method of transmitting data structures from one computer to another computer

A method of building an acyclic graph data structure sent from a first computer to a second computer comprising the steps of:

• receiving, by the second computer, a plurality of messages sent from the first computer to the second computer, each message containing data of a node of the acyclic graph data structure and one or more references to child pointer locations in any previously transmitted parent nodes to said node;
• building the acyclic graph data structure on the second computer, wherein building includes:
• storing the data of each transmitted node in a memory of the second computer;
• storing the location of an address at which each node is stored in the memory of the second computer in a table of addresses;
• and
• storing a child pointer to each node stored in the second computer at the or each child pointer location referenced in the message, wherein the or each reference to a child pointer location comprises an index into the table of addresses;
• and
• processing, by an application running on the second computer, the acyclic graph data structure during the building of the acyclic graph data structure on the second computer.