A Google Search:
Documentation is the Most Valuable Thing You Do (from cyborginstitute.org/projects/administration/documentation/).
Good documentation makes software and tools more valuable and more durable, and although documentation can be a great expense, in the long term it’s almost always worthwhile.
As part of its effort to set up a framework for a Common Community Physics Package (CCPP), the DTC’s Global Model Test Bed is documenting the Global Forecast System’s operational physics suite using “Doxygen” software.
Doxygen is [a] tool for generating documentation from popular programming languages include Python, Fortran, C, C++, IDL
This software parses specially formatted in-line comments and creates navigable and searchable web documents.
For the GFS physics suite, documentation is written within Fortran code, so is relatively easy to keep up-to-date as new developments are added to the model.
