Convert JSON CSLJSON to PPM

The JSON file extension, associated with CSL JSON (Citation Style Language JSON), is used to store and exchange bibliographic data. Commonly utilized in academic publishing and reference management tools, it allows for standardized citation and bibliography formatting. Originating from the need for a universal citation format in the early 2000s, CSL JSON has been widely adopted for its efficiency in organizing and sharing scholarly references. The format leverages the JSON structure for simplicity and compatibility across different systems.

The Portable Pixmap (PPM) file extension, an image format within the Netpbm family, stores simple, uncompressed images. Introduced in the late 1980s, PPM supports RGB color and grayscale images, making it suitable for basic image processing and conversion tasks. Its plain text encoding simplifies debugging and data manipulation, although its lack of compression results in larger file sizes compared to modern formats. As such, PPM finds limited use in contemporary applications, mainly in educational and experimental settings where ease of implementation and readability are prioritized.