It is important to understand the distinction between the following elements, as they are essential to the internal structure of Arbil:

corpus node

corpus session

corpus catalogue

IMDI is organized hierarchically, meaning that any number of other corpus nodes can fall under each corpus node . These nodes do not describe resources but are meant to construct the corpus structure only. It is the session nodes that include information about the actors, content, media file, project, source and written resources.

A corpus catalogue, on the other hand, is a general descriptive element of the whole corpus.

	Note
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