Support : Dialog Search Aids : Successful Searching : EXPAND

SELECTing Related Terms

When There Are More than 50 Related Terms

Sometimes there are more than 50 related terms for a given descriptor. Scanning and retrieving from these Related Term lists requires a special procedure, because an EXPAND command only provides up to 50 entries at a time.

When the entry for your descriptor indicates more than 50 related terms, enter the EXPAND command to obtain the first Related Term list, for which numbering will begin with R1. At this point, SELECT the terms in the list that you want to retrieve. If there is a sequential range of R numbers in your SELECT statement, use a colon to group the entries into a single set (e.g., SELECT R1:R50).

After you have retrieved this set of Related Terms, enter the PAGE command or EXPAND alone. The EXPAND display will continue with the 51st related term, but the numbering will be reset to R1. When you have seen all the Related Terms (or the next batch of 50), then enter the SELECT command to retrieve the items you want from this second list (e.g., SELECT R1:R19).

After you have repeated this process until you have retrieved all the terms you want, combine your sets using the logical operator OR (e.g., SELECT S1 OR S2). This will produce a single set containing all the Related Terms you have retrieved. You can use this set in combination with other terms to continue your search.

The following example illustrates this process. Intermediate Related Terms have been deleted from the example to conserve space.

Note: Since the colon does not convert R numbers to search terms, searches such as the one in the following example cannot be SAVEd. If you want to include R numbers in a SAVEd strategy, use OR to group the numbers together (e.g., SELECT R1 OR R2 OR R3 OR R4).

• To SELECT all Related Terms when there are more than 50:

?expand (hydrocortisone)
Ref   Items Type  RT  Index-term
R1    56071       91 *HYDROCORTISONE
R2    14238   B  603  ANTIINFLAMMATORY AGENT
R3    34085   B  194  GLUCOCORTICOID
R4        0   S    1  AEROSEB HC
R5        2   S    1  ALPHADERM
R6        0   S    1  BARSEB HC
R7        3   S    1  CETACORT
R8        2   S    1  COBADEX
R9        0   S    1  COMPOUND F
R10       1   S    1  CORT DOME
R11     191   S    1  CORTEF
R12      21   S    1  CORTENEMA
R13       1   S    1  CORTIBEL
R14       0   S    1  CORTIFAN
R15      14   S    1  CORTIFOAM
R16       1   S    1  CORTIMENT
R17       0   S    1  CORTIPHATE
R18   17103   S    1  CORTISOL
....
R42       0   S    1  HYDROCORTISONE ACETONIDE
R43       0   S    1  HYDROCORTISONE OINTMENT
R44       0   S    1  HYDROCORTISONE PLUS SALINE
R45       0   S    1  HYDROCORTISONE STEROID
R46       0   S    1  HYDROCORTISONE, TOPICAL
R47       1   S    1  HYDROCORTISYL
R48      27   S    1  HYDROCORTONE
R49       8   S    1  HYDRODERM
R50       5   S    1  HYSONE

Enter P or PAGE for more
?s r1:r50
      S1  100713  R1:R50

?p
Ref   Items Type  RT  Index-term
R1       30   S    1  HYTONE
R2        0   S    1  INCORTIN H
R3        0   S    1  MEDIHALER CORT
R4        1   S    1  MEDIHALER DUO
R5        2   S    1  MILDISON LIPOCREAM
R6        0   S    1  MUNITREN
R7        2   S    1  NEO CORTEF
R8        2   S    1  NEOCORTEF
R9        0   S    1  NOVOHYDROCORT
R10       0   S    1  NSC 10483
R11       0   S    1  NSC 741
R12       0   S    1  NSC10483
....
R28       0   S    1  11BETA,17,21 TRIHYDROXYPREGN 4 ENE 3
R29       0   S    1  11BETA,17ALPHA,21 TRIHYDROXYPREGN 4 
R30       0   S    1  17 HYDROXYCORTICOSTERONE
R31       0   S    1  4 PREGNENE 11BETA,17ALPHA,21 TRIOL 3
R32       0   S    1  4 PREGNENE 3,20 DIONE N BETA,17ALPHA
R33   30168   S    1  RN=50-23-7
....

?s r1:r33
      S2   30168  R1:R33

?s s1 or s2
          100713  S1
           30168  S2
      S3  100713  S1 OR S2

(File 72: EMBASE^®)
(File 154: MEDLINE^®)

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