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# 5 Oracle XQuery for Hadoop Reference

This chapter describes the adapters available in Oracle XQuery for Hadoop:

- Avro File Adapter

- JSON File Adapter

- Oracle Database Adapter

- Oracle NoSQL Database Adapter

- Sequence File Adapter

- Solr Adapter

- Text File Adapter

- XML File Adapter

- Serialization Annotations

This chapter also describes several other library modules:

- Hadoop Module

- Utility Module