Search fields - Registry File

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 following sections explain the most important search strategies. Further and more specific search profiles should be processed after consultation of the manuals Search Field Guide for the Registry File (Dictionary) and Registry File Dictionary Searching. 

Table 5. The most important search fields in the Registry File...

Very often a query with just a Registry Number does not yield a sufficient number of results. The chemical names must then be included in the search. In order to avoid writing every single name, the SELECT CHEM command was created, taking over every entry in the CN field of the Registry File. 

The search begins as a nomenclature search in the Registry File (Fig. 120). The command SELECT CHEM will write all the Registry Numbers and all entries in the Chemical Name (CN) field into a temporary memory. All such entries will receive an E-number, similar to the EXPAND command. 

Registry Numbers may be taken over from the Registry File (Sect. 7.3.1) or searched directly. As Registry Numbers are documented in the Basic Index, field qualifiers are not demanded for them. 

When the Registry Numbers of polymers are retrieved in the Registry File using the field Polymer Class Term (PCT) (Sect. 7.1.4.3), a supplementary Basic Index and abstract (search field lA) search should be conducted (Fig. 121). 

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 search for chemical compounds is processed as in the Registry File (Sect. 7.1.2). As the field Chemical Name (CN) is phrase-indexed, the entry of the search string must correspond exactly to the occurrence in the file. Preceding the query with the EXPAND command, as demonstrated in Fig. 143, will allow the precise entry to be found. 

The documents contain information which was drawn directly fi om the original publication. Registry Numbers are only included if the authors have used them in their original work. Therefore, in almost all cases, searching is only possible via titles as contents-relevant fields. Although, if they are contained in the original work, abstracts have already been added. These documents are usually found in the CApreviews file six to eight weeks before they are available in file CA. 

---