Semantic indexing is necessary when the type and size of data is diverse. Without semantic indexing ,by which a user can access or search data by semantic knowledge, a user has to figure out the correct or at least a portion of data values or as well known, keywords, to query the database.
EFIM models proposed here can serve the general purpose that unlimited number of heterogeneous sources can be mingled together via events. Their identities will be correctly built up by the event and possibly, numeric numbers, to represent themselves. However, for the human, who mostly start their internal data retrieval from the small semantic seed, may be in a word form, the semantic indexing and querying environment should be supported for general purpose semantic data processing.
A number of approach have been employed to support semantic indexing. The first convenient and most popular way is to have a user create the semantic label that represents a data. It is the role of a user to assign the proper semantic label to the data to keep the data uniqueness. The second familiar way in current IT technologies is employing the electronic dictionary that may map the data to a word or a set of words as an semantic index. Our approach follows the second way but in a way to expand the dictionary size by merging WordNet and Wiktionary which is an open free encyclopedia growing very fast. WordNet is famous lexical electronic dictionary that is being used by many semantic information related researchers. Wikipedia, more specifically WikiDictionary that will be used in our application, is based on public free contributions by the numerous Internet users