ui-gxmlcpp

"ui-gxmlcpp" is a high-level C++ wrapper around libxml2 and
libxslt. It might be a choice for if your needs are some subset
of:
.
- XML DOM Tree parsing.
- Basic read/write support from/to trees via XPath.
- Serialization.
- Stylesheets and stylesheet translation support.
- XMLSchema and RelaxNG validation.
.
If your needs are "lower-level" (e.g., proper DOM tree API
support or SAX parsing), "gdome2" or "xml++" will be the right
choices