Convert JSON CSLJSON to PNM

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 PNM (Portable Anymap) file extension, developed by Jef Poskanzer in the 1980s, stands for Portable Any Map. It is an uncompressed raster graphics format designed for portable image storage and exchange, encompassing three sub-formats: PBM (Portable Bitmap), PGM (Portable Graymap), and PPM (Portable Pixmap). PNM files store image data in plain text or binary format, ensuring easy usage across different platforms and applications. This format is widely supported by various image editing software and is valued for its simplicity and lossless compression.