2. The method of claim 1 , wherein estimating the similarity value further comprises: constructing a first language-independent semantic structure (LISS) for a first sentence of the first document; and identifying the first semantic class using the language-independent semantic structure.
2. The method of claim 1 , wherein estimating the similarity value further comprises: constructing a first language-independent semantic structure (LISS) for a first sentence of the first document; and identifying the first semantic class using the language-independent semantic structure. 10. The method of claim 2 , further comprising: constructing a second language-independent semantic structure for a second sentence of the second document; indexing the first language-independent semantic structure to produce a first index; and indexing the second language-independent semantic structure to produce a second index.