Abstract: Various implementations are provided herein for information classification and retrieval. In one implementation, a computer-implemented method is provided for indexing document information. The method includes obtaining textual information associated with a document, and obtaining one or more attributes associated with the document. Each attribute defines a property of the document. The method further includes generating a lexical representation of the textual information, generating one or more attribute patterns (wherein each attribute pattern contains a unique combination of the attributes), and creating a search index entry for the document. The search index entry contains the lexical representation of the textual information and each of the attribute patterns.