1. A computer-implemented method for extracting problem and solution signature from problem records through unstructured and structured text mapping, classification and ranking, comprising: analyzing structured ticket information of a problem ticket and extracting structured attributes from the problem ticket, the structured attributes comprising a system characteristic at a component level and at a functional level, a provided service at the component level, a provided service at the functional level, or combinations thereof; determining binding values for the structured attributes, a binding value for a structured attribute computed as a probability of occurrence of the structured attribute with respect to a probability of occurrence of another structured attribute; ranking the structured attributes based on the binding values; analyzing unstructured ticket information and generating a plurality of unstructured keywords that are related in context with one another and with respect to one or more of the structured attributes; ranking said plurality of unstructured keywords; and generating a signature for the problem ticket based on said ranking and binding values of the structured attributes and said ranking of said plurality of unstructured keywords, wherein the structured attributes include a plurality of data respectively associated with well defined fields of the problem ticket, the signature comprises a set of structured attributes and a bag of unstructured keywords, wherein the signature is formed for and associated with each given problem ticket.