Abstract: A method and server for ranking digital documents for a query are disclosed. T server hosts a search engine associated with an inverted index. The method includes accessing inverted index for retrieving query-independent data for a first document-term pair and a second document-term pair, where the query-independent data is indicative of (i) a term-specific occurrence of the first term in content of the document and (ii) a term-specific occurrence of the second term in the content of the document. The method includes generating a query-dependent feature using the query-independent data and which is indicative of a group occurrence of the first term with the second term in the content of the document. The method includes generating a ranking feature for the given document based on at least the first term, the second term, and the query-dependent feature, and ranking the given document based on at least the ranking feature.

Abstract: A method and server for ranking digital documents for a query are disclosed. T server hosts a search engine associated with an inverted index. The method includes accessing inverted index for retrieving query-independent data for a first document-term pair and a second document-term pair, where the query-independent data is indicative of (i) a term-specific occurrence of the first term in content of the document and (ii) a term-specific occurrence of the second term in the content of the document. The method includes generating a query-dependent feature using the query-independent data and which is indicative of a group occurrence of the first term with the second term in the content of the document. The method includes generating a ranking feature for the given document based on at least the first term, the second term, and the query-dependent feature, and ranking the given document based on at least the ranking feature.

Abstract: Methods and systems for generating a training set for training a MLA is disclosed. The method comprises: retrieving a plurality of SERPs, generating a graph mapping the plurality of documents and the plurality of queries, such that: a given node of the graph includes a given search query of the plurality of search queries; the given node is connected to a first subset of nodes, each one of the first subset of nodes having a document of the plurality of documents; a specific node of the first subset of nodes being connected to a second subset of nodes; receiving an indication of a search query to generate a negative training example for; identifying a node in the graph associated with the search query; generating the training set including the search query paired with a given document located in another node located by a pre-determined number of nodes away.

Abstract: A method and server for ranking digital documents for a query are disclosed. T server hosts a search engine associated with an inverted index. The method includes accessing inverted index for retrieving query-independent data for a first document-term pair and a second document-term pair, where the query-independent data is indicative of (i) a term-specific occurrence of the first term in content of the document and (ii) a term-specific occurrence of the second term in the content of the document. The method includes generating a query-dependent feature using the query-independent data and which is indicative of a group occurrence of the first term with the second term in the content of the document. The method includes generating a ranking feature for the given document based on at least the first term, the second term, and the query-dependent feature, and ranking the given document based on at least the ranking feature.

Abstract: Methods and systems for generating a training set for training a MLA is disclosed. The method comprises: retrieving a plurality of SERPs, generating a graph mapping the plurality of documents and the plurality of queries, such that: a given node of the graph includes a given search query of the plurality of search queries; the given node is connected to a first subset of nodes, each one of the first subset of nodes having a document of the plurality of documents; a specific node of the first subset of nodes being connected to a second subset of nodes; receiving an indication of a search query to generate a negative training example for; identifying a node in the graph associated with the search query; generating the training set including the search query paired with a given document located in another node located by a pre-determined number of nodes away.