2. The method of claim 1 wherein the first and second subsets of data comprise first and second documents having hyperlinks to other documents, and further comprising: identifying parallel hyperlinks in the first and second documents based on the alignment of the preprocessed tree structures, the parallel hyperlinks linking to a subsequent document in the first language and a subsequent document in the second language, respectively.
2. The method of claim 1 wherein the first and second subsets of data comprise first and second documents having hyperlinks to other documents, and further comprising: identifying parallel hyperlinks in the first and second documents based on the alignment of the preprocessed tree structures, the parallel hyperlinks linking to a subsequent document in the first language and a subsequent document in the second language, respectively. 3. The method of claim 2 and further comprising: obtaining a tree structure corresponding to each of the subsequent documents; aligning the tree structures corresponding to the subsequent documents; and identifying parallel textual segments in the subsequent documents.