Information management system retrieving recorded information version from server-side or duplicate local-side information storage

An information management system for management of streaming content which is divided into unit information to be delivered via a network, comprising:

• a server computer including a streaming server which, when providing streaming content varying with time, detects passage of time from start of delivery of the streaming content, transmits unit information obtained by dividing the streaming content and when a time specified by a synchronization file is reached, the unit information is affixed with a specification of relevant information to be synchronized with the streaming content;
• and
• a local computer including streaming content reproducing means, the streaming content reproducing means outputting a request for acquisition of the streaming content, reproducing the unit information of the streaming content transmitted thereto in response to the request, and, if the unit information is affixed with the specification of the relevant information, outputting a request for acquisition of the specified relevant information.

A server computer for delivering streaming content varying with time, comprising:

• storing means for storing a synchronization file in advance;
• and
• streaming content providing means, responsive to reception of a request to acquire the streaming content after starting to provide the streaming content, for transmitting, along with the streaming content, the synchronization file defining information to be synchronized with the streaming content and a synchronization reference time serving as a basis for displaying the information defined in the synchronization file and representing an elapsed time since start of delivery of the streaming content to trace back from a start time of providing the streaming content.

A computer-readable recording medium recording a server program for delivering streaming content varying with time, the server program causing a computer to perform a method comprising:

• storing a synchronization file in advance;
• and
• transmitting, responsive to reception of a request to acquire the streaming content after starting to provide the streaming content, and prior to provision of the streaming content, the synchronization file defining information to be synchronized with the streaming content and a synchronization reference time serving as a basis for displaying the information defined in the synchronization file and representing an elapsed time since start of delivery of the streaming content to trace back from a start time of providing the streaming content.