XACT

XACT is an API for writing XML transformations within Java

From Java we get for free:

• The strength of a general-purpose programming language
• A rich and well-known standard library
• Platform independence

Furthermore, XACT includes the following unique combination of features:

• High-level operations for construction and deconstruction of XML documents
• XML trees as first-class Java values
• Good runtime performance

The main selling point:

• XACT provides compile-time validation of transformed XML documents