| Virtuoso Sub-Code | Description |
|---|---|
| SR | SQL Runtime |
| FA | File access |
| SQ | SQL Compile |
| CL | client-side |
| HT | HTTP Server |
| FT | Free-text |
| DC | 2 phase commit |
| VD | VDB |
| DT | date/time routines |
| IN | Internationalization routines |
| RE | Replication |
| TR | Transactional replication |
| DA | WebDAV domain |
| SM | SMTP functions, Mail functions |
| PO | POP3 functions |
| NN | NNTP server |
| GN | GNW |
| XS | XSLT |
| CR | Crypto API |
| UD | User Defined Types |
| KB | Kerberos Library |
| HO | Hosting |