The second component of a data model is a set of operations that can be performed on the data. In this module, we'll discuss the operations without considering the bigness aspect. Now, operations specify the methods to manipulate the data. Since different data models are typically associated with different structures, the operations on them will be different. But some types of operations are usually performed across all data models. We'll describe a few of them here. One common operation extracts a part of a collection based on the condition.