There are few examples of business information (methodologies, advice, guidance, practices) using the open source model, although this is another case where the potential is enormous. ITIL is close to open source. It uses the Cathedral model (no mechanism exists for user contribution) and the content must be bought for a fee that is small by business consulting standards (hundreds of British pounds). Various checklists are published by government, banks or accounting firms. Possibly the only example of free, bazaar-model open source business information is Core Practice.