NODAL CONTENT in Argentina : a subject is constituted by global sections or contents, which contain sub-themes related to this subject. For example, the Pacific War is a nodal content that could encompass the subtopic saltpeter in the 18th century, origins of conflict, every battle fought, results, consequences over time. The bone system is a nodal content that you can have as subtopics. the parts of the skeleton, the spine, the skull, the limbs, the chest.
