Search options available in STN databases - FIZ Karlsruhe
Search options available in STN databases - FIZ Karlsruhe
Search options available in STN databases - FIZ Karlsruhe
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94<br />
Guide to <strong>STN</strong> Patent Databases<br />
long). A too short search term may result <strong>in</strong> a very long search time or even <strong>in</strong> the search be<strong>in</strong>g aborted. However,<br />
rather longer stems should be used, for the follow<strong>in</strong>g reasons:<br />
The short stem may occur <strong>in</strong> different contexts:<br />
=> S ?HEMD?<br />
L6 796 ?HEMD?<br />
=> D HIT 1 5<br />
.<br />
durch e<strong>in</strong>e stationaere Scheibe (10, 11), e<strong>in</strong> Kolbenhemd (14,<br />
15), das um e<strong>in</strong>e solche Scheibe herum gleiten kann, und zwei<br />
L7 ANSWER 5 OF 796 PATDPA COPYRIGHT 2002 DPMA/<strong>FIZ</strong> KA<br />
TI (CE) CEPHEMDERIVAT, VERFAHREN ZU DESSEN HERSTELLUNG UND DIESES<br />
ENTHALTENDES ANTIBAKTERIELLES MITTEL<br />
A too short search term may result <strong>in</strong> a very long search time<br />
This problem occurs mostly <strong>in</strong> German <strong>databases</strong> because the German language uses compounds extremely often.<br />
In any case EXPAND and EXPAND LEFT should be used to check <strong>in</strong> advance if the <strong>in</strong>tended search query will yield a<br />
reasonable result:<br />
=> E LEFT HEMD<br />
E1 1 CEPHEMCARBOXYLATKRISTALLE/BI<br />
E2 2 CEPHEMCARBOXYLSAEURE/BI<br />
E3 154 --> HEMD/BI<br />
E4 1 ABSCHIRMHEMD/BI<br />
E5 1 ANGLERHEMD/BI<br />
E6 6 ANNAEHEMD/BI<br />
E7 1 BAUKASTENHEMD/BI<br />
E8 1 BAUMWOLLHEMD/BI<br />
E9 1 BERUFSHEMD/BI<br />
E10 1 BLAEHHEMD/BI<br />
E11 1 BORDUERENHEMD/BI<br />
E12 5 BRENNKAMMERHEMD/BI<br />
...<br />
E130 2 HEMDENVERPACKUNG/BI<br />
E131 1 HEMDENVERPACKUNGSEINLAGE/BI<br />
E132 1 HEMDENVORDERTEILEN/BI<br />
E133 1 BESTEHEMDER/BI<br />
E134 3 CEPHEMDERIVAT/BI<br />
E135 1 THIACEPHEMDERIVAT/BI<br />
E136 2 ACYLOXYCEPHEMDERIVATE/BI<br />
E137 1 AMINOCEPHEMDERIVATE/BI<br />
If necessary a longer stem (possibly more than one) should be found <strong>in</strong> order to do a search with left and right truncation<br />
<strong>in</strong> a reasonable time.<br />
Stop words. Certa<strong>in</strong> frequent words are excluded from <strong>in</strong>dex<strong>in</strong>g <strong>in</strong> the Basic Index. These words become<br />
un<strong>available</strong> for search<strong>in</strong>g this way, even if used <strong>in</strong> a str<strong>in</strong>g search. If entered as part of a search they are normally<br />
ignored, but they are counted if proximity operators are used. It is a disadvantage, anyway, that this makes it<br />
impossible to search for certa<strong>in</strong> comb<strong>in</strong>ations of terms <strong>in</strong>clud<strong>in</strong>g stop words.<br />
When entered without proximity operators the words are l<strong>in</strong>ked by Implied Proximity. The system replaces spaces<br />
considered:<br />
=> FILE HCAPLUS<br />
=> S UNWANTED BY PRODUCT#<br />
11425 UNWANTED<br />
2185880 PRODUCT#<br />
L1 208 UNWANTED BY PRODUCT#<br />
(UNWANTED(1W)PRODUCT#)<br />
If a proximity operator was entered the computer will not recognize the stop words:<br />
=> S UNWANTED(W)BY(W)PRODUCT#<br />
11425 UNWANTED<br />
0 BY
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