15. A computer system of managing multiple versions of enterprise meta-models within an enterprise model using semantic based indexing, the computer system comprising: one or more processors, one or more computer-readable memories and one or more computer-readable storage devices; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to receive a search query from a user; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to determine from the search query a topic and at least two versions of a topic map meta-model of the enterprise meta-models within the enterprise model to compare; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to apply the search query from the user to a merged topic map meta-model of the at least two versions of the topic map meta-model by searching a topic map based index of the merged topic map meta-model, and producing a result; and program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to use the produced result to translate the topic from the search query in one of the at least two versions of the topic map meta-model of the enterprise meta-models to another version of the at least two versions of the topic map meta-model of the enterprise meta-models, and allowing data between the at least two versions of the topic map meta-model of the enterprise meta-models within the enterprise model to be correlated.
15. A computer system of managing multiple versions of enterprise meta-models within an enterprise model using semantic based indexing, the computer system comprising: one or more processors, one or more computer-readable memories and one or more computer-readable storage devices; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to receive a search query from a user; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to determine from the search query a topic and at least two versions of a topic map meta-model of the enterprise meta-models within the enterprise model to compare; program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to apply the search query from the user to a merged topic map meta-model of the at least two versions of the topic map meta-model by searching a topic map based index of the merged topic map meta-model, and producing a result; and program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to use the produced result to translate the topic from the search query in one of the at least two versions of the topic map meta-model of the enterprise meta-models to another version of the at least two versions of the topic map meta-model of the enterprise meta-models, and allowing data between the at least two versions of the topic map meta-model of the enterprise meta-models within the enterprise model to be correlated. 17. The computer system of claim 15 , further comprising: program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to create resource description framework triples for each version of the topic map meta-model; and program instructions, stored on at least one of the one or more storage devices for execution by at least one of the one or more processors via at least one of the one or more memories, to store the resource description framework triples into a repository.