The Zorba XQuery Processor

1.4.0

Zorba is a general purpose XQuery processor implementing in C++ the W3C family of specifications. It is not an XML database. The query processor has been designed to be embeddable in a variety of environments such as other programming languages extended with XML processing capabilities, browsers, database servers, XML message dispatchers, or smartphones. Its architecture employes a modular design, which allows customizing the Zorba query processor to the environment’s needs. In particular the architecture of the query processor allows a pluggable XML store (e.g. main memory, DOM stores, persistent disk-based large stores, S3 stores). Zorba runs on most platforms and is available under the Apache license v2.

Functionalities

• XQuery 1.0 and XPath 2.0 (as in the W3C recommendation).
• XQuery Update Facility 1.0 (as in the evolving W3C recommendation).
• XQuery Scripting Extension 1.0 (as in the evolving W3C recommendation)
• An in-memory replaceable XML store implementing the XQuery Data Model (XDM) W3C recommendation.
• XQuery 1.1 (upcoming W3C recommendation)
  • Group By
  • Try-Catch
  • Windowing
  • General FLWOR
  • Switch
  • Nondeterministic functions
  • partial support for higher-order functions
• Eval to dynamically evaluate a string and execute it as a query.
• The Zorba 1.0 Data Definition Facility (definition of collections, indexes, and integrity constraints)

XQuery Modules

Application Programming Interfaces (APIs)

• C++ API
• C API
• Java API
• Python API
• Ruby API
• PHP API

Build and Installation Instructions

• Build Instructions
• Installation

Configuration

• Using Option Declarations
• The fn:trace Function

Clients

• The Zorba Command Line Utility
• Debugger