In November 2011 NCBI plans to release version 2.0 of EFetch. The major changes and updates are as follows:

·         EFetch now supports the following databases: biosample, biosystems and sra

·         EFetch now has defined default values for &retmode and &rettype for all supported databases (please seeTable 1 for all supported values of these parameters)

·         EFetch no longer supports &retmode=html; requests containing &retmode=html will return data using the default &retmode value for the specified database (&db)

·         EFetch requests including &rettype=docsum will return XML data equivalent to ESummary output