Changes between WordNet 1.7.1 and WordNet 2.0 DATABASE CHANGES Added links for derivational morphology between nouns and verbs. This link is represented by the "+" pointer character. Added topical classification (domain) for some synsets. This relation is represented by the "-c", "-r", "-u", ";c", ";r", ";u" pointer characters. In the index files, the list of pointer types contains a "-" if the term is a domain, and a ";" if the term in assigned to a domain. In the data files, a "-c", "-r", or "-u" pointer type represents a link from a topical synset to a term assigned to its domain. A ";c", ";r", or ";u" pointer type represents a link to the domain for the synset. The index files for verbs no longer include the "+" pointer character in the list of pointer types to indicate that the synset contains verb frames. Verb frames are present in every verb sysnet. The "+" pointer character, if present in the list of pointer types, in any index file, indicates that there is a derivational morphology link for the word. LEXICOGRAPHER FILE CHANGES (Note - the lexicographer source files are not included in the standard Database Package. They are in the "grind" package that can be downloaded on request.) Lexical links for derivational morphology are represented as "+". Note that in verson 1.7.1, some links between nouns and verbs were present in the lexicographer files, but not in the database files. In the 1.7.1 lexicographer files, these links were represented by the "+" character, followed by a letter from "a" to "x". The letter is no longer present, and all derivational links are indicated simply by the "+" pointer type. Also note that the "+" character also precedes the list of verb frames in the verb data file. The verb frame list always follows the pointer list, therefore the "+" character used for the different purposes are distinguishable. Some synsets have been organized into topical domains. Domains are always noun synset, however synsets from every syntacic category may be classified. Each domain is further classified as a CATEGORY, REGION, or USAGE. A pointer from a domain term synset to its topic is represented by the ";" pointer character, followed by "c", "r", or "u", indicating the type of domain. The converse relation, from a domain to the synsets in that domain, is represented by the "-" pointer character, also followed by "c", "r", or "u". SEARCH CHANGES Added "Domain", "Domain Terms" and "Derivationally Related Forms" searches to implement above database changes. In the command line interface, these new searches are called with the "-domn", "-domt" and "-deri" arguments, followed by a part-of-speech character, as with all the other searches. WNB CHANGES Fixed broken "^G" shortcut for pulling up substring search on current search term. This didn't work on Windows or Linux. Enabled highlighting of text in output buffer so "^S" shortcut now works. This didn't work on Windows or Linux. Search term displayed in red in search output, not just overview window. USING 2.0 DATABASE WITH PRIOR VERSIONS OF THE SOFTWARE You cannot use the 2.0 database with prior versions of the WordNet library or interface code. The additional pointers described above are not recognized by the old code.