MathSciNet now includes Preliminary Data items, which are created from bibliographic data received directly from publishers. This data allows users to view early information about new papers in mathematics while full processing, including author identification and editorial decisions, is ongoing.
Preliminary Data items are marked as such until processing is complete. The initial group of publishers who have agreed to provide preliminary data feeds includes the American Mathematical Society, the Canadian Mathematical Society, the European Mathematical Society, the Mathematical Association of America, SIAM, Elsevier, and Springer.
More information and detailed descriptions of Preliminary Data and other item tags.