c# - Math model for determining more relevance set of rules -

i have string input data, it's request. there set of rules applying input string. so, instance, rule can "input parameter1 equals bla-bla-bla" or "input parameter2 contains bla-bla-bla".

the rules has "strength". example, "equals" rule has more strength "contains" rule. want develop algotihm or math model evaluate strength of rule sets.

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really, i'm looking more theoretical answer. links, articles, books appreciated.

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the reason of concept of strength have rule "parameter1 contains value 'google'" , rule tells "parameter1 equals value 'google'". second selected, because it's more expressive such input data.

although i'm not quite sure type of answer you're looking for, here goes:

one way of implementing assume order of rules in rules definition implies strength.

this mean first rule matches best , strongest match. shortest path complete proof of concept use regexes.

parameter1 = /^match this$/      #this more important partialwordfragment parameter2 = \bcontainsthisword\b parameter1 = partialwordfragment 

then load regexes , execute them on associated parameters. once match found, stop executing rules parameter.