1. An information retrieval system, the system comprising: at least one database storing a plurality of documents; a data structure caching a uniform resource locator for a document predefined to be relevant to at least a portion of a taxonomy; and a server coupled to the at least one database and the data structure, the server configured to: select the taxonomy for a query received from an application presented by a client access device based on provenance of the application; process the query against the at least one database using at least one content-based search engine to generate a search result that identifies at least one document relevant to the query according to a ranking order; extract the uniform resource locator for the document predefined to be relevant from the search result if the uniform resource locator exists in the search result; associate at a position of the ranking order in the search result the uniform resource locator for the document predefined to be relevant to the at least a portion of the selected taxonomy; and return the search result with the associated uniform resource locator for the document predefined to be relevant to the client access device.
1. An information retrieval system, the system comprising: at least one database storing a plurality of documents; a data structure caching a uniform resource locator for a document predefined to be relevant to at least a portion of a taxonomy; and a server coupled to the at least one database and the data structure, the server configured to: select the taxonomy for a query received from an application presented by a client access device based on provenance of the application; process the query against the at least one database using at least one content-based search engine to generate a search result that identifies at least one document relevant to the query according to a ranking order; extract the uniform resource locator for the document predefined to be relevant from the search result if the uniform resource locator exists in the search result; associate at a position of the ranking order in the search result the uniform resource locator for the document predefined to be relevant to the at least a portion of the selected taxonomy; and return the search result with the associated uniform resource locator for the document predefined to be relevant to the client access device. 7. The system of claim 1 , wherein the server is further configured to determine whether the uniform resource locator for the document predefined to be relevant based on the at least a portion of the taxonomy cached in the data structure exists in the search result.