Abstract: Methods and systems for providing random access to structured media content are described. The described methods and systems implement one or more of an importance evaluator module, a priority evaluator module, and a preemptive loader module. The importance evaluator assigns importance values to different portions of a structured media content file. The importance values are used to determine whether to remove individual portions of the structured media content file from a client cache file to make room for other more important file portions. The priority evaluator assigns priority values to different portions of a structured media content file. The priority values are used to determine an order in which the portions are to be provided from a server to a client. The preemptive loader preemptively facilitates provision of one or more portions of a structured media content file to a client, without the client specifically requesting so.

Abstract: A rectilinear layout system creates a diagram (graph) from information about items (nodes) and relationships among the items, such as the information which defines data bases, computer networks, and object based systems. The rectilinear layout system designates one of the items as a focus node and partitions the remaining items into clusters (sub-graphs) of related nodes. Multiple location groups are created that are relative to the focus node for the graph and each sub-graph is assigned to a location group. The rectilinear layout system then plots a location for each node in each of the sub-graphs by recursively iterating through the sub-graphs, designating focus nodes for each sub-graph, creating lower level sub-graphs, and assigning the lower level sub-graphs to location groups relative to the corresponding focus node until a lower level sub-graph contains only a single node.