XQuery

BaseX provides an implementation of the XPath and XQuery languages that is tightly coupled to the underlying database store. The query processor is also a flexible general-purpose processor that can access and process local and remote sources and output results in a variety of formats. BaseX is highly conformant to the official specifications. This section contains information about the query processor and its extensions:

XQuery Language

• XQuery Introduction: The main concepts of the language
• XQuery 4.0: New syntax, operators and functions
  • Invisible XML: Parse text with context-free grammars
• XQuery 3.1: Maps, arrays, lookup operator, arrow operator
• XQuery 3.0: Enhanced FLWOR expressions, function items, try/catch
• Functions: Standard and custom function modules

Advanced Features

• Full-Text: Use BaseX as a full-fledged full-text processor
• Updates: Modify databases and local resources via XQuery Update
• Indexes: Build and utilize index structures
• XQuery Optimizations: How queries are rewritten and evaluated

Custom Features

• Java Bindings: Access and call Java code from XQuery
• Repository: Install and manage XQuery and Java modules
• XQuery Extensions: Options, pragmas, annotations, …

Serialization & Errors

• Serialization: Serialization parameters supported by BaseX
• XQuery Errors: Errors raised by XQuery expressions