Learn XQUERY with Real Code Examples
Updated Nov 20, 2025
Architecture
Functional and expression-oriented
Sequence-based data model
Hierarchical document processing
XPath Navigator Engine
Optimized for XML database indexes
Rendering Model
XPath navigation over XML trees
Sequences processed functionally
FLWOR for structured queries
Constructors for output documents
Streaming possible in some engines
Architectural Patterns
Document-centric applications
Metadata-driven pipelines
Functional query modules
XML database-backed services
REST/XQuery hybrid APIs
Real World Architectures
Enterprise content management
Publishing automation
Large-scale metadata repositories
Digital archive systems
REST + XQuery backend services
Design Principles
Functional immutability
XPath-centric navigation
Declarative querying
Hierarchical data focus
Structured transformations
Scalability Guide
Use native XML indexes
Partition large collections
Avoid deep document traversal
Optimize FLWOR where clauses
Leverage server-side caching
Migration Guide
Convert XSLT or DOM logic to XQuery
Modularize FLWOR statements
Use database optimizations
Refactor complex XPath filters
Adopt RESTXQ for servlet replacement