10. An apparatus for generating a document structure, comprising: an aligning module configured to align various parts in the first version and the second version in at least one pair of historical versions among a plurality of historical versions of a document; a dividing module configured to divide the first version and the second version into a plurality of blocks on the basis of a Levenshtein distance between the aligned parts in the first version and the second version; an evaluating module configured to evaluate a level of the block in the document structure on the basis of text features of the block among the plurality of blocks; and a generating module configured to generate the document structure on the basis of a position of the block according to an evaluation result.
10. An apparatus for generating a document structure, comprising: an aligning module configured to align various parts in the first version and the second version in at least one pair of historical versions among a plurality of historical versions of a document; a dividing module configured to divide the first version and the second version into a plurality of blocks on the basis of a Levenshtein distance between the aligned parts in the first version and the second version; an evaluating module configured to evaluate a level of the block in the document structure on the basis of text features of the block among the plurality of blocks; and a generating module configured to generate the document structure on the basis of a position of the block according to an evaluation result. 18. The apparatus according to claim 10 , wherein the plurality of historical versions are plain text files.