| Microsoft XML Core Services (MSXML) 5.0 for Microsoft Office - DOM Developer's Guide |  |
What are the MSXML Helper APIs?
The MSXML Helper APIs are a set of COM objects that provide support functionality. For example, these APIs:
- Simplify certain DOM tasks, such as managing namespaces
- Enhance XSLT performance by caching compiled style sheets
- Enable direct interaction with a Web server
See Also
Concepts | How Do I? | MSXML Helper APIs
Other Resources 
W3C Document Object Model (DOM) Level 1 Specification (Second Edition)