1. A computer-implemented data processing method comprising: receiving, by a processor, a document comprising content original to the document and content added to the document by a document user; comparing, by the processor, the document to representative document components in a component repository, wherein the original content has a characteristic that matches at least one of the representative document components, and wherein the added content has no characteristic that matches any of the representative document components; identifying, by the processor based on the comparison, a first portion of the document containing the original content and a second portion of the document containing the added content; and generating, by the processor, a copy of the document in which the first portion of the document containing the original content is included and the second portion of the document containing added content is excluded.