Each entry in the knowledge processing engine is called a 'document'. Each document may be composed of multiple data objects, such as images, embedded audio files or text fragments, to list a few. Although the engine is fully content agnostic the official environment system distribution includes some fundamental types that are used internally to…

type.d

module core.data.type;

// Enumeration of the core hierarchy types.
enum : string
{
    	item = "core.item",			// Abstract item.
	list = "core.item.list",		// Abstract List of items.
	file = "core.item.file",		// Filesystem object.
	link = "core.item.link",		// A reference to an item.
	data = "core.item.data",		// Binary data object.
	meta = "core.item.data.meta",		// Metadata item.
	text = "core.item.data.text"		// Text data object.
};