8. The system of claim 1 , wherein tagged data identifying portions of a document for alteration comprises tagged data identifying portions of a document for alteration based on classifying the identified portions as sensitive data.
1. A search result presentation system, the search result presentation system comprising: one or more processors; system memory; a database comprising tagged data, the tagged data tagged from one or more documents, for each of the one or more documents, the tagged data identifying items in the document for which the document may be searched and the tagged data also identifying portions of the document that are eligible for alteration, based on classification of the identified portions; a presentation engine for processing a plurality of search results, the presentation engine configured to: identify a search result from within a previously returned plurality of search results, the previously returned plurality of search results including the one or more documents, the identified search result for a document from among the one or more documents, the search result referencing a tagged portion of the document; determine that a user has access privileges to at least a portion of the document based on an access policy; determine that the user does not have access to the tagged portion of the document based on classification of the tagged portion and based on the access policy; and alter the search result so that that the tagged portion is not presented as part of the search result to the user.