Among other disclosed subject matter, a computer-implemented method includes receiving a plurality of electronic documents associated with a domain at a server. Each of the plurality of electronic documents includes meta-data and textual content. The method includes identifying one or more text strings in the textual content that are to be processed differently than an identical or similar text string in other electronic documents, and associating, with the electronic document, data indicating that each of the identified text strings is to be processed differently than an identical or similar text string in other electronic documents. The method also includes performing an analysis of the electronic documents to identify one or more subsets of the electronic documents that include related subject matter. A plurality of degrees of relatedness can be associated with text strings associated with data indicating that each of the text strings is to be processed differently.