Retrieval of content using link-based search

A system, comprising:

• one or more processors, and
• memory to maintain a plurality of components executable by the one or more processors, the plurality of components comprising a query application configured to:
• receive a request comprising a link directed to a source webpage, wherein the source webpage includes a subject of interest within content of the source webpage;
• determine that a database associated with the server includes the link, wherein the database stores one or more links directed to one or more webpages, one or more subjects of interest included within content of each of the one or more webpages, and one or more pieces of information related to each of the one or more subjects of interest;
• in response to the determination that the database includes the link:
• identify, based at least in part on the link, the subject of interest of the source webpage in the one or more subjects of interest stored in the database,
• identify at least one piece of information stored in the database related to the subject of interest, and
• provide the at least one piece of information to a computing device.

A non-transitory computer-readable storage medium, storing program instructions that when executed by one or more computing devices cause the one or more computing devices to implement:

• receiving, from a computing device, a request comprising a link directed to a source webpage, wherein the source webpage includes a subject of interest within content of the source webpage, and wherein the request is for at least one piece of information (a) related to the subject of interest and (b) from at least one webpage (i) different from the source webpage and (ii) other than a version copy of the source webpage;
• determining that a database associated with the server includes the link, wherein the database stores one or more links directed to one or more webpages, one or more subjects of interest included within content of each of the one or more webpages, and one or more pieces of information related to each of the one or more subject of interest;
• and
• in response to the determination that the database includes the link:
• identifying, based at least in part on the link, the subject of interest of the source webpage in the one or more subjects of interest stored in the database, and
• providing, to the computing device, the at least one piece of information stored in the database related to the identified subject of interest.

A method, comprising:

• receiving, by a server, a request from a computing device, wherein the request comprises a link directed to a source webpage, and wherein the source webpage includes a subject of interest within content of the source webpage, and further wherein the request is for at least one piece of information (a) related to the subject of interest and (b) from at least one webpage (i) different from the source webpage and (ii) other than a version copy of the source webpage;
• determining that a database associated with the server does not include the link, wherein the database stores one or more links directed to one or more webpages, one or more subjects of interest included within content of each of the one or more webpages, and one or more pieces of information related to each of the one or more subjects of interest;
• and
• in response to the determination that the database does not include the link:
• analyzing the source webpage to determine one or more parameters related to the subject of interest included within content of the source webpage,
• based at least in part on the one or more parameters, performing a search for pieces of information related to the subject of interest from one or more webpages (i) different from the source webpage and (ii) other than version copies of the source webpage, and
• providing a search result to the computing device.