Product News

European Patent Classification Thesauri Added to DWPI

April  24th,   2011

Thesauri for ECLA (European patent classifications) and ICO (In Computer Only) are now available in the Derwent World Patent Index (DWPISM) databases on STN (WPINDEX/WPIDS/WPIX).

The European Patent Classifications are indexed in the search fields /EPC (for ECLA codes) and /ICO (for in-computer-only codes). Both thesauri will be updated on a monthly basis subject to availability of the data.

Hierarchies of terms in the thesaurus can be displayed using the EXPAND command followed by a plus symbol (+), a Relationship Code and /EPC or /ICO, e.g., e A01B+all/epc.

To use the thesaurus to automatically include additional Narrower, Broader, Related, and other terms in a search, the SEARCH command should be entered with a term followed by a plus symbol (+), a Relationship Code, and /NCL, e.g., s K01B+nt/ico.

The thesauri can be used with the EXPAND and SEARCH command in the EPC and ICO fields. The following relationship codes are available:

 

Relationship  Code           Description  ----------     -----------  ALL            All usually required terms  AUTO           Automatic relationship  BT             Broader terms  CODE           Classification Code  DEF            Definition  HIE            Hierarchy terms (all broader and narrower terms)  KT             Keyword terms  MAX            All associated terms  NEXT           Next classification within the same class  NEXT(n)        Next n classifications within the same class  NT             Narrower terms  PREV           Previous Code within the same class  PREV(n)        Previous n classifications within the same class  TI             Complete title including broader terms

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