olemus
reeglite kogum
= a set of rules

näiteid
https://www.cs.ait.ac.th/~on/O/oreilly/tcpip/sendmail/ch08_03.htm

https://docs.oracle.com/en/database/oracle/oracle-database/19/dvadm/configuring-rule-sets.html

https://documentation.sas.com/doc/en/edmcdc/v_045/edmug/n1x25tpifysjnnn11bpi2igy786w.htm

vt ka
- algoritm