Crossfile searching

In the case of crossfile searching combining the Registry File with another database, which does not contain Registry Numbers, the SELECT CHEM command must be replaced by the SELECT NAME command. 

If you wish to find out if there are documents for a certain compound in CApreviews, refer to the Locator field (LC) in the Registry File. Crossfile searching between Registry File and CApreviews is effected by the command SELECT NAME or SELECT CHEM, provided that it is a substance-orientated query. 

The Locator field (LC) in the Registry File shows whether the database CAOLD provides a certain document for a compound or not. Crossfile searches can be carried out following the explanations in Sect. 7.1.1. Crosssearching fi-om the Registry File to CAOLD is possible by means of the Registry Number only, because the database does not contain any text information. Subsequently, the source has to be retrieved from the printed Chemical Abstracts. 

The AN numbers in CASREACT correspond to those in the CA File. Cross-references to CASREACT can be found in the CA database in the field Other Sources (OS). By using the Accession Number you can carry out simple crossfile searches from CA to CASREACT (Fig. 135). 

Fig. 135. Crossfile search for piceol from CA to CASREACT via Accession Number...

The MEM and MEMSORT commands are powerful instruments for conducting crossfile searches including the World Patents Index and also statistical evaluations of search results. 

Crossfile search non standardized term. Mostfully used for a retrieval (Unction to process search results of a database automatically in another one, e.g. an answer set of CAS Registry Numbers, which are searched in the Registry File, can be processed in the CA File to search the corresponding literature. Sometimes the term is used for an index search. 

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