| >Abstraction layer | software that translates higher-level requests into lower-level commands the computer can use (for example, an API, or Application Programming Interface, is an abstraction layer which communicates between an application and the operating system.) |
| FDW | Foreign Data Wrapper: “a library that can communicate with an external data source, hiding the details of connecting to the data source and obtaining data from it.” source: PostgreSQL Documentation |
| GUI | Graphical User Interface: the software which allows users to visually control an underlying data structure, as opposed to a command-line interface, which requires the user to memorize text-based commands. |
| JSON | JavaScript Object Notation is a common data format used to exchange data, i.e. between web applications and servers. JSON is a language-independent data format. JSON file names use the extension .json. source: Wikipedia |
| relational model | “The relational model (RM) for database management is an approach to managing data using a structure… where all data is represented in terms of tuples, grouped into relations… Users directly state what information the database contains and what information they want from it, and let the database management system software take care of describing data structures for storing the data and retrieval procedures for answering queries.” source: Wikipedia |
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