1. A method comprising steps of: (a) obtaining a descriptive text for a multimedia content from a vendor's catalog; (b) standardizing the descriptive text for the multimedia content to generate a token for the multimedia content; (c) checking whether a matching token already exists in a catalog of a media store server; (d) classifying the multimedia content in a group for multimedia contents corresponding to the already existent matching token, when the matching token already exists in the catalog of the media store server, by: (d1) assigning to the multimedia content an integer grouping key identifying, in the catalog of the media store server, a particular existing group of one or more multimedia contents corresponding to the existent matching token; and (d2) storing the assignment of the integer grouping key corresponding to the existent matching token, for the grouping of the multimedia content in the particular existing group together with the one or more multimedia contents, in the media store server; and (e) generating a new group for multimedia content and assigning the multimedia content corresponding to a token that is non-existent in the catalog of the media store server, to the generated group, when the matching token does not exist in the catalog of the media store server, by: (e1) generating an integer grouping key and a group corresponding to the generated token; (e2) assigning the integer grouping key to the new group; and (e3) storing the assignment of the integer grouping key and the grouping of the multimedia content to the group corresponding to the generated token in the media store server, wherein each integer grouping key identifies, in the catalog of the media store server, multimedia contents corresponding to diverse versions of a same music item or video item.