This page is an index of overview documents that describe, non-technically, different classes of element found in Layer 2 of the oai4courts caselaw metadata standard. They provide descriptions of the different logical entities described by the oai4courts Layer 2 elements, as well as pointers to each.
Note that these are intended for use in caselaw metadata (as opposed to caselaw markup), but some of the thinking involved applies to both.
Overview descriptions exist for:
Sets and tags
OAI-PMH supports a system for the creation of sub-collections that it calls "sets".
oai4courts adds database support for a less-formal system of tags. Sets are named
according to a hierarchical system that implies an equally hierarchical partitioning
of the database. Tags may be applied in any way you like.