10. One or more computer-readable media having computer-executable instructions embodied thereon that perform a method to track previews selected for protected electronic documents, the method comprising: receiving rules from owners of protected electronic documents; receiving a query having query terms from a client device; generating a search session for the client device; searching the protected electronic documents to locate the query terms; transmitting a preview of each protected electronic document, wherein the preview is a viewable portion of a region of the protected electronic document that includes the query terms; receiving a request to preview additional portions of the protected electronic document; and providing the additional portions of the protected electronic document based on the rules.
10. One or more computer-readable media having computer-executable instructions embodied thereon that perform a method to track previews selected for protected electronic documents, the method comprising: receiving rules from owners of protected electronic documents; receiving a query having query terms from a client device; generating a search session for the client device; searching the protected electronic documents to locate the query terms; transmitting a preview of each protected electronic document, wherein the preview is a viewable portion of a region of the protected electronic document that includes the query terms; receiving a request to preview additional portions of the protected electronic document; and providing the additional portions of the protected electronic document based on the rules. 13. The media of claim 10 , wherein generating the search session for the client device further comprises creating a cookie to identify the client device during subsequent search sessions.