There are no formal rules that govern objections. Instead, objections are based on alerting the court that other rules of evidence have been violated. While objections must be specific they are not required to invoke the rule being violated by numerical reference, but rather alert the court to the principle being violated. Examples include objecting to admitting evidence on the basis of an improper foundation or lack of relevance. Most frequently objections occur in response to specific questions during the examination of a witness.