International Patent Classification (IPC) - Documentation, DTDs and Schemas
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Documentation
| IPC Master files specification (Version 2.0) | |
| QC010 Amendments to Master files and Internet publication (Version 1.1) | |
| Specification of RCL file in Word format (Version 2.0) | |
| Specification of the validity file in Word format (Version 2.2) | |
DTDs
| DTD for catchword index (Version 1-01) | |
| DTD for compilation file (Version 1-03) | |
| DTD for concordance list (Version 1-00) | |
| DTD for elayer definitions (Version 1-02) | |
| DTD for elayer illustrations (Version 1-01) | |
| DTD for IPC scheme (Version 1-02) | |
| DTD for validity file (Version 1-01) |
Schemas
| Schema for catchword index (Version 1-01) | |
| Schema for compilation file (Version 1-01) | |
| Schema for concordance list (Version 1-00) | |
| Schema for elayer definitions (Version 1-01) | |
| Schema for elayer illustrations (Version 1-00) | |
| Schema for IPC scheme (Version 1-02) | |
| Schema for validity file (Version 1-01) |


