oai4courts layer two is intended to be a "working" schema adequate to represent most caselaw metadata using OAI-PMH. The approaches taken will also be useful to other caselaw-metadata efforts (for example, metadata that is embedded in case files themselves). Its place in the overall plan for developing the oai4courts metadata standard is documented here.
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Court names and identifiers
Relationship with other courts
[[ NB: if you're looking for systems to use in marking up dates in judicial opinions, you might take a look at
Dates are a surprisingly complicated topic, with many subtleties and variations. That is because almost any milestone in the process of hearing the case and carrying out its resolution can have a date associated with it, as can any of the documents generated along the way. Every case will have a date of decision. Most appellate cases will have an argument or hearing date. Beyond that the varieties are practically infinite: