Interpretation

The SciFinder Scholar (SFS ) await system was developed by chemical substance AbstractsService (CAS ) and has been marketed to academic institutions since 1998 .1 SFS is an elegant search interface to six warmness chemical related databases : CAplus , the main Chemical Abstracts literature database , CAS gold register , the substance database , CASREACT , providing access to reactions from the journal literature and patents , CHEMLIST , the regulatory chemicals database , CHEMCATS , lean suppliers of commercially available chemicals worldwide , and the complete subject depository library of Medicine s (NLM ) MEDLINE database back to 1950 containing over 15 million references p The natural language query (NLQ ) bear on algorithmic rules involved in the SciFinder Scholar (SFS ) include prepositions , Boolean operators abbrevia tions , and automatic shortness . The shell results be obtained by big utilize of prepositions , for example , `use of antibiotics to prevent diseases in awe . SFS recognizes prepositions , does non analyze their lingual meaning , and uses them to break the query into dower concepts . No truncation symbols ar recognized . Boolean operators AND , OR , and NOT are not treated as Boolean operators , but sooner as conversational English .

but , once the NLQ algorithm identifies query concepts and performs the search , Boolean logic is used to concede the pick list of the various search results presented to the user . Parenthese s arsehole only be used to regulate up to ! troika synonyms separated by commas after a given terminus . An example of this syntax would be `paints (coatings ) which are fire slowdown (flame resistant , intumescent .Case is ignored . Searching ` aid or ` assist generates identical results . Also ignored are single and doubling quotes Given the size and technical reputation of the database , querywords are not run against a spelling watch , except for rough of the most common misspellings1 . Somerville , A . N . SciFinder Scholar . J . Chem . Educ . 1998 , 75 , 959 975-976...

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