Method of generating a set of itineraries by limited querying of databases

A method of handling requests of a content-requesting client by querying a plurality of content provider platforms, wherein a request comprises an origin, a destination, and at least one of a departure time and an arrival time, wherein the method comprises a graph generating process performed by a route module before a request from the content-requesting client is received, a route selecting process performed by the route module after the request from the content-requesting client is received, and an offer building process performed by an offer module after the performance of the route selecting process,

• wherein the graph generating process comprises:
• gathering data from the plurality of content provider platforms;
• generating a plurality of transport-service graphs, wherein each transport-service graph comprises a plurality of nodes and internal edges connecting the nodes, wherein the nodes represent stops in a corresponding public-transportation network and the internal edges represent connections between the stops;
• generating a connection graph comprising the plurality of transport-service graphs;
• wherein the route selecting process comprises:
• selecting an origin node and a destination node in the connection graph according to the origin and destination, respectively;
• selecting one or more routes between the origin node and the destination node comprising joining for a route a number of successive segments, a segment being a transportation connection between two nodes of a single transport-service graph by one or more internal edges;
• wherein the offer building process comprises:
• sending at least one query asking a price and availability of a segment of the routes selected by the route selecting process to a respective content provider platform, wherein the query comprises at least one of departure time and arrival time of the segment based on at least one of the departure time and the arrival time of the request and on an estimated travel duration of preceding and subsequent segments, respectively;
• aggregating responses from the queried content provider platforms in order to build an itinerary for each route selected, thereby building a set of itineraries;
• generating an offer comprising the set of itineraries to be sent to the content-requesting client.