.. _UC43:

Use Case 43 - Index Content for Discovery
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.. index:: Use Case 43, update system metadata, UC43

Goal
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Update a search index to reflect the properties of an object.

Summary 
~~~~~~~

TODO


Actors
~~~~~~

- Indexing service
- Coordinating Node


Preconditions 
~~~~~~~~~~~~~

- Object exists within the DataONE system


Triggers
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- A new object or its system metadata becomes known to Coordinating Nodes.
- Properties of an existing object (System Metadata) are modified.

Post Conditions
~~~~~~~~~~~~~~~

- The search index reflects the current state of the object