Media circulation auditor BPA Worldwide has amended its rules (pdf) to audit standalone digital magazines in addition to digital versions of print publications, writes DM News. The amendments revise BPA's definition of digital products, among other changes, including when digital magazines may be reported as benefit-of-membership subscriptions. Also according to the amendments, "e-newsletters and Web sites, do not qualify as digital publications/magazines" - but digital and print magazines may be classified as "versions" or "editions" - writes MediaPost.

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For business-to-business publications, demographic print and digital editions must have at least 50 percent of editorial content in common with the print publication, whereas geographic print or digital editions need have only "common editorial scope" with the original publication.

For consumer magazine editions, both demographic and geographic editions must contain "the same editorial content, with only such variations in editorial matter required by the different demographic or geographic audience served." For consumer digital demographic and geographic editions, the BPA said advertising, layout and pagination "need not be common."