1. A method for adaptive indexing of multimedia content, the method comprising: identifying a keyword associated with a first feature and a second feature found in a data portion of a multimedia item, the first feature being of a first media type and the second feature being of a second media type, and the first media type being associated with a first weight, and the second media type being associated with a second weight; determining a relevance for the keyword by calculating a relevance value using said first weight and said second weight; updating the first weight associated with the first media type based on a search result selected by a user from a set of search results that were identified to the user in response to a query from the user to produce an updated first weight, wherein the selected search result indicates a multimedia item having a feature being of the first media type and another feature being of the second media type, each of the features being associated with the keyword; updating the second weight based on a particular set of content items being identified by the selected search result to produce an updated second weight; and updating the relevance of the keyword by calculating a relevance value using the updated first weight and the updated second weight.
1. A method for adaptive indexing of multimedia content, the method comprising: identifying a keyword associated with a first feature and a second feature found in a data portion of a multimedia item, the first feature being of a first media type and the second feature being of a second media type, and the first media type being associated with a first weight, and the second media type being associated with a second weight; determining a relevance for the keyword by calculating a relevance value using said first weight and said second weight; updating the first weight associated with the first media type based on a search result selected by a user from a set of search results that were identified to the user in response to a query from the user to produce an updated first weight, wherein the selected search result indicates a multimedia item having a feature being of the first media type and another feature being of the second media type, each of the features being associated with the keyword; updating the second weight based on a particular set of content items being identified by the selected search result to produce an updated second weight; and updating the relevance of the keyword by calculating a relevance value using the updated first weight and the updated second weight. 9. The method of claim 1 , wherein the multimedia item is a web page comprising a first file and a second file, wherein the first file is an HTML document and the second file is one of an image file and a video file, the first feature with which the keyword is associated was found in a data portion of the first file, and the second feature with which the keyword is associated was found in a data portion of the second file.