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The Breidbart Index, developed by Seth Breidbart, is the most significant ''cancel index'' in Usenet. A cancel index measures the dissemination intensity of substantively identical articles. If the index exceeds a threshold the articles are called newsgroup spam. They can then be removed using third party cancel controls. ==Cancel Index== *Crossposting is the act of posting the same message to multiple newsgroups *Multiposting is the act of posting the same contents multiple times The principal idea of the ''Breidbart-Index'' is to give these methods different weight.〔(<news:36i6hk$3li@panix3.panix.com> )〕 With a crossposted message less data needs to be transferred and stored. And excessive crossposts (ECP) are also a likely beginner's error, while excessive multiposts (EMP) suggest deliberate usage of special software. The crucial issue is categorizing multiple articles as ''substantively identical''.〔 This includes *byte-for-byte identical messages *otherwise identical postings minimally customized for each group it appears in *advertising the same service *articles that consist solely of the same signature *articles which consist of inclusions of other user's postings, but are otherwise identical 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Breidbart Index」の詳細全文を読む スポンサード リンク
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