What is the difference between shared/component and standard ruleset

What is the difference between shared/component and standard ruleset

The Feature of Shared RuleSets, which distinguishes them from RuleSets “used in more than one application,” is the fact that Shared and Component RuleSets will sort to the bottom of an application RuleSet List – only the Process Commander RuleSets are lower in the list. 

Example :

This means that the rules in a Shared RuleSet cannot depend upon functionality from any other RuleSets except for Process Commander RuleSets – including other Shared or Component RuleSets (since they may be listed in a different order in different application rule definitions).

If you have functionality in a RuleSet which is included in several applications, and you think this RuleSet should be designated as type Shared, look at where that RuleSet is in the current application RuleSet List. If this RuleSet contains classes, or if it depends upon other RuleSets which are lower in the list, then it cannot be marked as type Shared, even if you consider this a “shared” RuleSet. This RuleSet must be defined as type Standard, and listed under the Application RuleSets section of the application rule.

You can refer below articles

https://pdn.pega.com/when-create-shared-rulesets

https://pdn.pega.com/how-create-component