So far, writing any new data into an API has involved creating resources, complete with their unique identifiers and schemas. Unfortunately, as much as we might want this to be the one and only way to create data, it sometimes does not quite fit with the realities of the world. Indeed, there are scenarios where data needs to be written but not uniquely identified after the fact, such as entries in a log file or time series data points to be aggregated into statistics. In this pattern, we address this idea of writing data rather than creating resources and how this new concept can still fit with our existing resource-oriented design principles.