The storage of collections (and collection objects) in a file-based Solid pod

[lem-onade]

Quick recap of what we recently discussed.

Collections and collection objects are saved and discovered as follows:

• The profile behind the WebID contains a solid:publicTypeIndex property. The value of this property is a link to the public TypeIndex file, present on every Solid pod (at this time).

• This file contains a solid:TypeRegistration for the schema:DataCatalog, in which acts as an overview for collections. This registration points to the file in which the schema:DataCatalog is stored.

• The data catalog contains references to all collections, which are also stored in the same file as the catalog. The collections each contain schema:distribution triples. The distributions are also saved in this file and are used to reference the associated collection objects.

• Collection objects that belong to the same collection are to be saved in one file, so that they can be referenced with the same schema:contentUrl from a given distribution. This file is a 'dump' of all collection objects belonging to a specific collection.

An example can be found in 'nde-erfgoed-pods', in the 'data' directory. (to be merged into master)

Feedback welcome.