SP500207 TIPSTER Panel -- DR LINK's Linguistic-Conceptual Approach to Document Detection chapter E. Liddy S. Myaeng National Institute of Standards and Technology Donna K. Harman Venezuela and its creditor banks agreed yesterday to restructure $3 bmion of its foreign debt the verb `agree' triggers a set of case frames in the knowledge base with the additional informaUon provided by the preposition `to' followed by another verb, the correct case frame (i.e. RRF for case relaUons) will be chosen: (((A X S) ((AT ? to+V) (CT ? that))) where the first element of each of the two list indicates the relation (e.g. A for AGENT, AT for ACTIVITY, and CT for CONTENT) the second specifies the LDOCE semantic restriction (e.g. X for `abstract or human), and the last shows the syntactic or lexical clue that must be satisfied in order for the case frame to be instantiated. In this example, S is for a sublect, to+V for an infinitive, and `that' for a relative clause. The two sub-lists, (AT ? to+V) (CT ? that), indicates that only one of them is triggered at a given Ume. Eventually the following set of triples are generated: [agree] -> (A) -[OCRerr] [country: Venezuela] [agree] -> (A) -> [creditoLbank] [agree] -> (AT) -> [restructure] where the concept node [country: Venezuela] is formed by applying rules from the Proper Noun knowledge base and processor. 2.e. Conceptual Graoh Generator Given the triples generated in the RCD module by applying various types of RRF, the next step is to merge them to form a complete CG for a sentence, paragraph, or an SRF component. The resulting CGs consist of not only concepts and relaUons but also instantiations or referents of concepts, which are usually derived from proper nouns like company names but can be another CG derived from a nested clause, thereby albwing for nested CGs. Since the different types of RRF in the knowledge base are developed and applied in the RCD modules in a more or less independent manner, a form of conflict resolution is necessary in this component. Given the set of concept[OCRerr]relation-concept triples as shown above and another set derived from the verb `restructure' with a frame ((A X S) (P W 0)): [restructure] -> (A) -> [country: Venezuela] [restructure] -> (A) -> [creditor_bank] [restructure] -[OCRerr] (P) -[OCRerr] [debt] where A and P are for `agent' and `patient' relations, and [debt] -[OCRerr] (ME) -[OCRerr] [money] [debt] -> (CH) -> [foreign] are produced by a special handler within the RCD, where ME and CH stand for `measure' and `characteristics', the CG generator produces the following CG for the sentence: 123