I'm trying to find information about meaning of tags used in RDF dump files. Actually, I would like to know detailed meanings (or differences) of <narrow>, <narrow1> and <narrow2> tags, for example.
To the best of my knowledge:
In the structure rdf, narrow tags show subcategories. (symbolic tags show @ links - categories located not directly underneath, but somewhere else, but *could* be logically considered subcategories of the current one)
narrow1, narrow2, and narrow [and same with symbolic1, symbolic2, and symbolic] show different "sort priorities" given to categories.
narrow2 is the highest, narrow1 is in the middle, and narrow is the bottom.