Abstract: Aspects described herein relate to maintaining a dataset with approximate constraints including determining, for a dataset, a constraint collection of tuples that satisfy a constraint and an exception collection of tuples that are an exception to the constraint, constructing, for the dataset, a sharded bitmap of bits, wherein each bit in the sharded bitmap indicates whether a tuple in the dataset is in the exception collection of tuples, wherein the sharded bitmap includes, for each shard of multiple shards, a bitmap of bits and a starting bit location index within the sharded bitmap of bits for the shard, and processing a query on the dataset including processing the constraint collection of tuples and the exception collection of tuples based on the sharded bitmap.

Abstract: A data logger for collecting, storing, and transferring data received from a sterilizer is described herein. The data logger is sized and shaped to fit into a slot or opening defined by the sterilizer and previously used for receiving a printing device to output sterilizer data on a printer ribbon. The data logger includes a circuit to facilitate receiving data formatted to conform to at least two different transmission protocols (e.g. RS-232 serial data transmission protocol or TTL serial data transmission protocol). The circuit allows the data logger to be used with different styles of sterilizers and thus increases the set of viable sterilizers. The data logger includes at least one memory device for storing the logged data. This memory device may be a removable component. The data logger may also include a port or connector element for a second memory device such as a USB stick.