Community:NCore/Model/Objects/Aggregator

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Contents [hide] 1 Overview 2 Core Components 2.1 Relationships 2.2 Datastreams 3 Other Components

Overview

Aggregators represent a grouping of objects in the repository as selected by a single Agent. Although based on a relatively simple concept, Aggregators form the building blocks of more complex structural or semantic constructs.

Examples of some using Aggregators to form useful constructs include:

• Selecting the resources that comprise a collection
• Selecting the collections that comprise a library
• Selecting resources in a library that are part of a showcase exhibit
• Defining a journal issue as a set of article resources
• Maintaining a list of useful resources to share within an application

Core Components

All components are optional unless indicated otherwise. Components from other namespaces or models are not represented here.

Relationships

• aggregatorFor required - Indicates the one Agent that has selected the contents of this Aggregator.
• associatedWith - indicates that it is associated with a resource that represents the aggregation.
• authorizedToChange required (from Authorization model) - indicates the Agent(s) that can modify its components or membership.
• memberOf - indicates that this aggregator is a member of another

.

Datastreams

• ServiceDescription required Contains simple authoritative metadata and branding info</tt>

Other Components

• setSpec (from OAI model) - (Deprecated in Aggregators) indicates that this Aggregator represents an OAI set.
• setName (from OAI model) - (Deprecated in Aggregators) indicates the human-readable name of the OAI set this Aggregator