International Patent Classification (IPC) - Download Area - Version 20090101

Documentation, DTDs and Schemas

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Specification of RIPCIS output files in Word format  (Version 20060509)
Specification of RCL file in Word format (Version 1.0)
Specification of the validity file in Word format (Version 1.9)



DTD for validity file (Version 1-01)
DTD for concordance list (Version 1-00)
DTD for IPC scheme (Version 1-02)
DTD for catchword index  (Version 1-01)
DTD for elayer definitions (Version 1-02)
DTD for elayer illustrations (Version 1-00)
DTD for compilation file (Version 1-02)